Thanks a lot for your comments!
The most interesting part in this situation that.. g/f knows this from the day #1. Even before we "had" something. She was ok in the beginning (weird, right?). And then (that what he told me), she started fighting for him when she realized that it is not only about sex...
I wish i can just let go easy.. and it kind of happens for a while (longest was 3 weeks), but then he texts me a cute message or teases me or something like that and i am giving up. It feels just so right to be with someone who shares a lot of your dreams/interests. I've been for too long in a relationship (9 years) with nothing in common at all. But I gave this up in order not to settle for less.. He just doesn't seem to give away "steadiness" even though few times he was ready to leave and was looking for a place..
I would really like to try fighting for him - of course not in a bad way - by just showing how much I care.. and I do care a lot about him..