Sorry to hear about your situation. That sounds difficult, especially knowing that the tight knit group before. Christians who truly love Jesus tend to be really tight with each other.
One thing I would recommend, personally, is a fast. Try a fruit and vegetable fast for a few days, get all of the gunk out of your system. This will significantly help your will power - which is what you NEED to be able to overcome porn and jerkin' mr merk.
Second, I would recommend a lifestyle change. Baby steps, don't go all at once or else you will utterly fail. A couple of things would be working out more, staying on the internet less. YOU control that, no body can do it for you. I personally believe that you are able to do it. If you are pretty out of shape right now, start walking then. The olympians had to start somewhere, too.
About the social issues, that is not something I am qualified to speak on, especially since I do not know you personally.
Regarding the spiritual issues, the fact that you talked about this to me says you may be looking, I don't know for sure but it may be the case. I can tell you from personal experience that Jesus Christ is very real, and He is will to help you fight against these urges, but only the urges, He wants to revamp your entire life so that you will have peace that cannot be found elsewhere, THROUGH the storm, not simply away from it. Two of my favorite books are by one of the world's most prolific female writers. You can Google them. Steps to Christ, and Desire of Ages. The first is a little book about how to know Jesus as a personal friend. The second talks about the life of Jesus, the life of victory. I am sorry to hear that your tight knit group was suddenly swept from underneath your feet. It is never fun dealing with those changes. I can assure you God is nearer than you may believe.
On a final note, look at this website too and you will find some VERY helpful stuff: www.howtostopmastubation.com
It's possible to be happy. It's not too far from you. Don't look in the places you've already looked. Search outside of yourself. The hand of the Lord is near the broken hearted, and those who cry out for Him will be answered