geez Youth its a great post but I wish you'd just CALM DOWN a bit. Somehow you've got this idea that your life is much worse than anyone else's but it really isnt. You've got it hard, but there are lots of people like that in this strange world of ours.
Having said that, you are FAR too hard on yourself,and that is just going make it harder to get out of any loops that you might presently be in. Also you've obviously gone over this so many times in your head that that in itself becomes yet another loop. And so you have loop after loop after loop.
The problem is that any advice we can give, even if you were to take it seriously, could easily lead to yet another loop.
That's all that any addiction is: a loop. But creating another loop will not help one bit and the only way to break those loops is by going out of yourself somehow. That comes down to friends and I know how hard it can be to make friends, especially if someone says to you: you should go make some friends. . . . . I've also seen in so many of your past posts just how prickly you make yourself, and I guess you do that IRL too. (I've always wondered about the two question marks in your nick. What's that about??)
Don't blame your computer or the net. They are just there. You turn to them because they dont run away. They are just stopgaps for the moment. Don't WORRY about that. It's the worrying which creates the loops. The loops create the loops so that becomes a loop in itself.
God isn't like you, by the way. He doesnt judge in the way you do. Why would He need to when you judge yourself so harshly already!?
You're a horny young guy. So what?!
The only advice I can give though - especially if friendships are really difficult for you - is to try to give as much of your time (especially early in the day) to prayer. (Before you turn the computer on.) Turn off the TV. Read the bits of the bible that you love the most and aim for some silent time. It's ok to be screaming at God but you got to give Him space and time to REPLY! He can't do it unless you are quiet. If the quiet is impossible start small: a few minutes here and there. God seems very quiet and very slow to grown-ups let alone teenagers. I once read a book called the 'Four mile an hour God' and that says it all. You got to be PATIENT!
Don't expect God to answer your prayers. His agenda is very different and you have to be open to that.
Enough preaching. Good luck! We're on your side.