Sometimes you just have to say no. I find it extremely difficult to say no to people. Do you want to go to dinner? Yes. But actually I mean no, I would rather go home and eat by myself and not talk to anyone. Do you want to do (insert activity here). Yes. But actually no, no I don't.
I've gotten better about saying no, but my no skills could use some work. So ask me to do something soon that way I can practice telling you no.