That feeling is very very foreign to me because everyone around here knows what to do and not what to do, and one of the things you arent supposed to do is disrespect someone's relationship like that.
As soon as I got a girlfriend (wasn't serious kinda forced into it) the hottest girl I've ever seen was coming on to me and continued after I had broken up with that 1st girl but I was a wuss back then.
I mean that was the reason for dating in the first place, but now its more convenience than anything else. I singed a lease with her and one of my friends for an apartment next year for school so that's really the main thing, i just don't want that to get ****** up and screw anyone over. I mean she is a good person and I would never cheat or anything but i really don't "love" her. I just keep finding reasons to not like her.
I'm not one to give relationship advice. But there are lots of couples who find out reasons not to like their other but they love (or like) each other despite those reasons.
If you're just unable to look past those reasons to not like her (or love) then I'd suggest doing what dealwithitfagg says and just break up. Keeping her with you despite not really liking (or loving) her is just hurt you and her in the long run.
If you can try and look those past her reasons and like (or love) her despite her faults, then you should give the relationship one last chance. If not, I'd suggest breaking it off.
I don't know man... you might just want to break up, otherwise you just keep lying to her and mostly to yourself. Do you really want to stay with someone you don't love? Living together is very hard and it might get worse. It also could get better of course
Also you actually would screw someone up then, right?
Do you have this feeling already for a long time?