But somehow I can only fall in love with guys who already have a girlfriend -- or guys who live in another country (like the one I met during gaming years ago and chat with online).
Well, the answer kind of depends on who you are, doesn't it?
It might be that you want only the guys you know you can't have. If so, there could be any number of reasons for that.
It might be that you have some sort of self-esteem problem -- that you can't fall in love with any guy who would lower his standards so far as to be interested in you. (This isn't what I'd expect of someone in an acting career, but you never know.)
The "never been kissed" part is intriguing and rather strange. Either you simply haven't dated eligible guys, or you have dated them and your attitude somehow makes them not want to kiss you.
Do you have any male friends your own age, whether you've dated them or not? If so, ask them what's going on.