You have to do it someday. In the last 2 months I've changed from doing nothing but boozing my couch, usually alone, to going out and having fun.
I ditched all my friends who wanted to sit on the couch, smoke, and booze. I ditched my roommates, all they did was play magic the gathering, and moved out. I quit my dead end job. I quit doing drugs, and I quit making excuses.
Now I have a new life, more or less, and I went back to university as well. I still talk to some of my old friends, but they're the kind of people I want to be around, not people like I was.
Everything is looking up now. I've gained a ton more confidence from doing new things and new situations, gotten a bunch of numbers (I couldn't make eye contact back in the day), and made a bunch of new friends.
Silly story, but 2 months ago I was about to kill myself because I hated the life I made for myself, but I'm starting to get out more and it's been a lot of fun. I think I've had more fun since I quit my old life than I did during the last year of living it.
The biggest advice I can give you is that the first time doing anything will always be the hardest.
thanks for reading my dumb post, but I had to share that some of the teachings on this site have improved my life. although I don't like a lot of the girl advice, not my style.