<human>: I've been in the same relationship for 4 years now and at first everything seemed to be going smoothly.  We're both 20, almost 21 at this point. Prior to getting into the relationship she felt like she was one of those girls that was out of reach (as far as dating was concerned) so I avoided trying anything for a few years. Turns out she felt the same way about me ironically enough, so we ended up going out. The point when this happened was pretty sudden so I didn't get a lot of time to figure out what she was really like until we got into the thick of being together. Her and I had a lot in common it seemed, fairly similar on how we felt about certain things, common interests, generally the same group of friends, etc. But now it feels like after 4 years the only thing holding the relationship together is the people that we both know, and the fairly inconsistent sex that it seems we both find 'meh' at best at the point. Now it feels like I can barely even tell what she wants, or vice versa in her case. The relationship is fairly long distance because of college, most of the academic year we live 6 hours away because of university choices, not exceedingly far, but enough that I have to continually find 3 days off of work and classes in order to meet with her. And recently it's seemed I'm not the only one who has lost interest. We've been consistently having more fights, albeit fairly small in general, but they've exponentially grown from week to week. There's also the point that she for the longest time has hated one of her exes, but suddenly as he comes back into town for a visit she is dying to spend time with him. And when I say hate, I mean blood boiling period induced crazy rage that would have most men meet their end. Doesn't really concern me that it's him, its just that she's had such a random change of heart when everything has seemed meh as of late.

Give me the gist of the text in a nutshell
<bot>: Feel like I don't know my partner as well, both of us have lost excitement in the relationship.  Only thing holding the relationship together is the casual sex and group of friends we both know.