<human>: My girlfriend and I have been in an on-again-off-again relationship for two years. We have broken up several times for different reasons- not really logical reasons mind you, it's always been more out of teenage angst fueled rage. Both she and I have initiated breakups in the past, and they have rarely lasted longer than two days. 

But see, the issue here arises because now I want to break up with her (for real this time!) because I feel that the relationship isn't working for several reasons. Because of these past break ups we've had I feel that I've trapped myself in a boy who cried wolf situation, where now if I break up with her it won't be taken seriously- not to mention I would feel like a complete asshole for breaking up with her for the umpteenth time. I don't know. This whole situation just feels toxic and trapping- which I completely accept a good portion of the blame for. it takes two to tango y'know?

The reasons I have for thinking it isn't working are pretty convoluted and I don't think they're wholly necessary to discuss the subject at hand, so I will leave them out unless they are deemed otherwise.

This might sound a little fucked but recently I've been hoping she cheats on me just so I would have a real reason for breaking up with her. The main reason I feel like I need to have a real issue to break up over is that I think it will be less emotionally damaging for her (she is kind of unstable) if I give her a reason why, one that she could understand.

at the end of the day I do love her but I just feel like we both need to move on with our lives, and that we are fundamentally incompatible people (as should probably be evidenced by the frequent breakups)

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I want to break up with my girlfriend but I have no idea how; I feel like I need to have a valid reason to do so.