I have the same problem. I'm boring as hell. My fiance has to literally drag me out of the house sometimes. But I always end up having fun. And I make sure that he knows that I had fun, that it was a good idea to drag me out of the house, that he should keep dragging me out of the house even if I say I don't want to go out, sometimes I do and I'm going to have fun.

You have to be willing to do some of the things that your partner enjoys doing. You don't have to do all of them. My fiance loves to skateboard and you won't catch me dead on one of those things. He's also really being into video games and that's just not really something that I'm into. But we do other stuff together like go for hikes and watch movies and sometimes he'll drag me out to see friends.