Reddit, some advice please with my crazy girlfriend...

A lot of the times, I really like my girlfriend. Other times I totally hate her. Our last fight was because we haven't had sex in a couple days. She asked me something like: "We haven't had sex in two days, that means that you're not attracted to me anymore, right?". My answer was "not necessarily". She took that to mean that I'm not sure if I'm physically attracted to her anymore. I definitely am still attracted to her, and what I meant was simply that she shouldn't draw that conclusion just because we haven't had sex for a couple of days. We ended up arguing about that for way too long. It only ended after I started agreeing with her that I don't find her attractive, and then she started arguing against me again, arguing my original point.

That's happened a few times where we're arguing, I'll start agreeing with her, and then she'll change sides too, arguing in my favour.

During our argument she threatened to break up with me. I'm really not sure if I want to continue our relationship, and I let her know that. Soon after, she's back in love with me and trying everything to get me to stay.

This girl is really driving me crazy. Does anyone have any advice? Should I leave her?