I had this exact same problem, it is actually quite a common and serious problem that is strangely avoided by most doctors and even google, I found a reddit page called No Fap which helped me out a little bit, but basically, it's really not going to be easy, but you can't masturbate for a long time I am guessing by your name handyman, that you enjoy mastubating alot.
Tell me if this sounds like you because this was me. I could get hard and fuck her, but I wouldn't feel a thing, actually it was like antifeeling, it was like sticking my dick into a black hole, I wasn't even sure if I was hard at time unless I checked. The girl was loving it though, but I couldn't feel shit, oral had some feeling to it, but most of the feeling was at the tip, and alot of girls think that blowjobs involve rapidly rocking their head back and forth like a fucking sex doll, hasn't any girl ever heard of treating a dick like a lolipop? have you ever seen someone eat a lolipop by rapidly banging their head back and forth and sucking? No didn't think so...
Anyway back on topic, I was actually the same age as you when this happened to me and I am now 22 and I can come most of the time if I havent masturbated more than once that day before having sex, so don't worry, you can masturbate again, just for now, you have to hold off, for a really long time, try and have sex as much as possible, and no matter how much your balls hurt, just keep at it, it took me 2 weeks of sex every day for hours on end with no masturbation, it literally got to the point where my balls hurt when I was walking around and sitting down and my ctomach hurt and all I wanted to do was fucking cum. Then one time she was about to cum and I thought I could feel her cumming, but it turned out it was me.
after my brain/dick finally realized that this was what it was meant for and how good it felt everything changed to the horror of my girlfriend, I was cumming after only like 20 minutes of sex whereas before I had been going for liteerally hours and hours and hours. I still couldn't really feel my dick in her pussy, but if I fucked her hard enough and fast enough I could generally cum, this girl also happened to be a great deepthroater which could help get me horned up and ready to hump like a rabbit and cum almost as fast, she also happened to be small so I kinda just used her boddy like a ragdoll and it almost felt like the motion of using my hand to make her fuck me helped my brain to understand that I was supposed to cum as this was a similar motion to masturbation.
On a side not I also didn't wear a condom because she assured me she was sterile, which appeared to be true for the first couple of months and then around the third month we had to get an abortion. but if you can fuck her without a condom and she doesn't mind you cumming inside her and she has birth control, that will help alot too, condoms only make it worse. Although, have you every tried masturbating with a condom on? its a whole nuther form of masturbation, it works quite well for me.......... sorry if you didn't want to know that, just kinda adding to it as I go.....
So to sum it all up, don't fucking touch your dick, no matter how bad you want to, have as much sex as possible and when you think you can't take it anymore your almost there just go a little bit further, it will happen for you. It is worth it and once you get past the first one the next ones come on easier and easier, and eventually you can throw some masturbation in there again so your not known as 5 second tim. Personally I can still go for hours after going through this as I now know what triggers in my brain make me cum and how not to cum, so now I only cum when I want to. Like they say, what doesn't kill you only makes you stronger. So push through it, I can't stress this enough, don't fucking touch your dick. no matter how bad your morning wood is or even when your erection starts waking you up in the niddle of the night or even when you wake up one morning and your dick hurts because it was so fucking hard all night. I have been there and if you give in your just resetting yourself and you have to start all over.
I think for me the hardest part was the morning wood and the wake you up in the middle of the night wood and the sore but still hard dick in the morning, that and hiding my random erections in public. Lucky for me I spent almost all of that time with my girl and she was happy to fuck anywhere, we even fucked in a church parking lot one time in the back seets of her car, all leathery slippery and sweaty, but fun. and kinda funny too, we fucked in the middle of downtown Seattle too and someone knocked on our window and told us to move on hehe good times.......
For the last time, don't touch your dick, have lots of sex and get ready to feel what it feels like to cum inside a girl, it is way better than masturbating, if alot harder, but well worth it. Even cumming all over a girl somehow feels better. God I wish my girlfriend wasn't miles away visiting her parents right now.....
