Cheers Avextracker, Aros2k and WarmRushes.
Avextracker, my dosage and usage of GBL went a little like this...
15th Oct - Tried 1.2ml of GBL in the evening, on an empty stomach. Felt relaxed but a little nauseous no euphoria present, effects lasted around 90 minutes. Got the munchies, ate an epic amount of pizza! This was the only time I ever got the munchies from GBL. Did some work, went to bed about 4 hours later.
17th Oct - Did 1.4ml of GBL in the evening, watched some TV. Slight euphoria present, enjoyable. Effects again lasted about 90 mins. Redosed 1.2ml (gelcaps) with some Methylone in a club (Fabio was playing %)) at around 1am. Felt very floaty but slightly nauseous which I felt took something away from the Methylone experience. About 5 hours later, got home at 7am, myself and a friend did 1.2ml of GBL and smoked a big fat joint. Felt extremely euphoric and induced strong feelings of empathy whilst watching Human Traffic and chatting away about...well...codshit

Felt at peace with the world. My best GBL exp.
19th Oct - Mixed 1.4ml of GBL with 30 Liberty caps. Very fun and introspective. Lay on my bed thinking about life, meaning and the universe. Tingling all over felt fantastic! Next day, I feel how I normally do after shrooms; thoughful
21st Oct - Woke up at around 2pm with a banging hangover

Dosed 1.3ml GBL every 2 hours, 5 times and watched a lot of peep show %) Went to sleep after my 5th dose, woke up after about 2 hours; felt alone. Physically, felt dizzy and achy. Was able to sleep after an hour or so. In the morning, I felt a little hungover but mostly okay. Looking back this was probably a good sign to cease use... At the time, I thought I had maybe caned it a little too hard and to do less next time.
23rd Oct - Woke up again after another heavy night. Not feeling too good, dosed 1.6ml of GBL. Dose was a little higher than usual and felt fairly dizzy. Fell into G induced sleep for an hour or so. Woke up with a strong urge to do more GBL, resisted the urge and tried to go about my daily activities. Felt a definite lack of motivation for the rest of the day. Kept thinking about my path in life, negative thoughts etc. Everything seemed so futile. Joints felt achy and it took around two hours to get to sleep (as oppose to the usual of less than 5 mins!) My calf muscles ached, well they usually do after GBL but even more than usual. On Friday, felt nauseous and weirdly stimulated. Not the "
I could do anything" type stimulation like from base but jittery like from too much caffeine.
26th Oct - Did about 1.5ml of GBL at around 2am (technically Monday morning

) Went into G induced sleep after watching Keith Lemon's World Tour (highly recommended

) Woke up (normal GBL wake-up) about 1-2 hours later after a strange dream where I was stabbed with a hypodermic needle in the leg by a homeless woman after I accidentally stepped on her foot! Until writing this I never though about it that it could represent addiction but that now seems pretty obvious...
(I now repeat little bits of what I said in my last few posts but go into more detail)
27th Oct- Woke up feeling empty. Looking in the mirror wasn't really like looking at myself, just another person staring back. Everything felt wrong and I felt so cold and lonely but was surrounded by friends. My negative thoughts spiraled and enveloped everything. I felt like I was going crazy and nothing would be good again. Thoughts had a looping pattern like whilst on shrooms. This was worse than any come-down or difficult experience I've had on psychedelics. It was like an inverted MDMA: everything and everyone was cold and numb. I felt awake yet sleepy at the same time, couldn't sleep. Posted on Bluelight, the evening progressed and I felt calmer. What came next though was easily the worst nights of my life! I searched on the internet to try to find what was happening to me. I wouldn't let myself believe it was the GBL that was doing this, it seemed too unlikely. Nobody got withdrawls from GBL anywhere near this quick... It was as though I was tricking myself...With hindsight; it was obvious I was going through withdrawals. (Always is with hindsight I guess! 8) )
At times, I was pretty sure I was having some sort of mental break-down, so much confusion and frustration. The GBL sitting in my cupboard seemed so tempting, I could just knock myself into deep nothingness..be out of this cycle of negativity. I knew though that I would just wake up a few hours later needing more to get back to sleep. I woke up after a few hours of restless sleep (this was after feinting... wish my bathroom was carpeted lol) I smoked a tiny bit of weed I had; at first my mind felt soothed but my thoughts changed, it was almost as though I was tripping. Shadows seemed sinister, colours seemed so washed out and pasty. Weed had never felt like this to me before...probably was a bad idea to do it

My mind raced like never before. Thoughts raced through my mind. It was similar to doing loads of speed and weed in terms of the way my thoughts went through my head so fast. They were all so negative. I thought about poverty, hate and unhappiness. I yearned to be unconscious. I suddenly remember the bottle of whiskey I had...what a relief... I gulped it down, my mind stopped racing and I slipped into what felt like the best sleep of my life!
28th Oct - Woke up after three hours of sleep, feeling achy and flu like. My mind and my heart had stopped racing. The world seemed bleak but with a slight glimmer of hope

I've spent all day drinking beer and feel massively better now. My eyes are no longer dilated and I can talk to people again. I'm hoping I'm going to be able to get some sleep tonight...
I've never been through any sort of WDs before and naively thought that:
a. I would never get addicted to G in the first place.
b. WDs would only leave me feeling flu-like, I didn't think about the mental aspect of the experience, which was easily the worse part for me. Though the insane heart rate and my legs flying about all the time was something I'm in no rush to go through again, it was the thoughts of despair and sadness that really got to me.
GBL, I think, is a very strange drug. At first it seemed so empathetic and euphoric. After my last few doses though, it didn't feel anywhere near the same. Much more like alcohol (yawn

)
Massive thanks to Shambles and everyone that helped me out

Thanks for the advise Valkyrie, I got a GBL using mate and I'll tell him about L-Glutamine.
EDIT: Ah, thought the WDs had almost gone... I didn't have a beer over the last 4 hours and I'm beginning to sober up. I can feel the weird jittery stimulation returning along with my joints, muscles especially my calf muscles aching. On the bright side, they're nothing on what I felt yesterday evening/this morning and I think I'll be able to get some sleep, possibly alcohol induced though

Hopefully, as I used so little GBL to get withdrawals, they won't last very long...Otherwise, I'm going to have one hell of a hangover lol! I can't imagine going through this without alcohol or another depressant at hand.