This basically sums up to me not fully agreeing that this post should be closed: How to tell partner we need boundaries?
I think we are all pretty much in agreement that this isn't healthy behavior being exhibited by OP's girlfriend. However, the OP is looking for a way to bring this up with her before considering a breakup. I don't understand how it's our place to make personal decisions to not offer the OP any advice on how to speak to his girlfriend by closing the question - especially when the OP seems annoyed/bothered more than emotionally distressed or otherwise compromised by her behavior.
Could someone clarify with cited notation of where this is policy, if there's something I'm missing? Is it (has it ever been) our place to close questions seeking interpersonal solutions just because we deem that the OP could benefit more from a different type of solution?