Are you in London? (£1500 p/m for rent and bills sounds like London to me!) There's no shortage of things to do, Meetups, groups, societies, and places to go.
You're young. So young. Don't worry about your friends not wanting to go out so much -- find new ones who do, and who are willing to take you out to bars and clubs to show you the ropes of chatting up strangers, if that's your thing.
That said, were I in your position, I'd be tempted to do the 'freelance around the world' thing. I can put you in touch with someone who's doing exactly that if you like.
I would like to travel and freelance around the world. The thing is i don't know is it sustainable model. I read this thread and think to myself how envious I am. Does freelancing mean working at odesk and such sites or what?
You're young. So young. Don't worry about your friends not wanting to go out so much -- find new ones who do, and who are willing to take you out to bars and clubs to show you the ropes of chatting up strangers, if that's your thing.
That said, were I in your position, I'd be tempted to do the 'freelance around the world' thing. I can put you in touch with someone who's doing exactly that if you like.