dude this is the worst the feeling in the world and i totally sympathize with you. i know when im coming off dope or something i wake up in the morning and i think "oh fuck.. another fuckin day." its unbearable. i remember i would put off going to sleep at night as long as i could until i physically passed out, just because i knew the next morning this feeling was coming. it wasnt even the the physical withdrawals that always drove me back to dope, it was the soul crushing depression i would wake up with every morning.
the only way i ended up getting clean and starting to break the cycle (and believe me, im still not fully there yet - its a bumpy road at best) was the realization that life was going to suck no matter what i did at this point. whether i used and got some temporary relief or i just stuck to the withdrawal, life would still be shitty for me. so i realized the only sane thing i could do was accept the suckiness of my life at this moment and just work on myself and work on getting clean. and it hasnt been easy and ive had my relapses but i find the more i stick to just living my life without getting fucked up all the time the better i feel. and eventually that hopeless dread i use to wake up with everyday faded.
the thing is everytime i use now, even though im no longer physically addicted to heroin, i wake up again with this horrible feeling for the next couple days and its never worth it. just hang in there man, i know how you feel and im pulling for you. you can get out of this, as hopeless as it seems right now. you can turn it around.
by the way, one of the things that really changed things for me was taking lsd.. if you can get clean long enough for your body to balance out you should try taking some lsd, listening to some good music and closing your eyes.. i learned so much about myself this way and its helped me work through a lot of my issues. and if you want a full blown over night life changer, try candy flipping. (lsd + mdma) this little known secret is gods gift to humanity and will change the way you see everything literally over night.