<human>: Can you condense the text into a few key points?

I dated a woman off-and-on for the better part of 2014, and finally broke up permanently a few months ago. We'd been hanging out more as friends the past few weeks and last night hooked up again.

I've tried dating around in the few months we were broken up, and didn't really meet anyone that I clicked with like I do with her. I'm a decent looking guy but pretty bad at dating, mostly because it feels like such a charade and I have such little patience for "playing the game" or any of it. I had kissed but not slept with anyone since we broke up around 4-5 months ago. 

We absolutely cannot work as a long term couple, which we tried over and over again last year with no success, and the same irresolvable problems happening. For example, she doesn't get along with any of my friends at all nor me with hers, and we're driving each other crazy (in a bad way) at least like a third of the time.

Being back with her felt really good, and sort of inevitable. It felt more like reliving a really happy memory than starting something new. I'm still really attracted to her and like her as a person, but remain totally convinced that we can't function as a couple in the long term. That's pretty much where I'm at with it, and I'm not sure what she thinks last night meant.

Mostly just wanted to get this off my chest and am hoping that talking about it can help me make more sense of it. Is it unfair to her to have gone through with this without being totally back into the idea of starting a relationship? Is it possible for exes to be FWB? Does this mean we're sort of dating again by default? Best and worst ways to handle this?
<bot>: Hooked with with my ex last night and not sure what it means or what she wants (or what I want).