I don't know what to tell you. In my experience, friendships take a LOT of effort. I have to do about 2/3rds of the calling and setting things up.
On the other hand, I see what you mean about not feeling like going. I am bad at cancelling things and I hate doing it. But sometimes it is just to hard.
Maybe take it slow....try to pick just a couple of people and do several things with them. Then add people in as you feel you can.