<human>: I started dating this girl about 4 months ago, right before school ended and everything was great. Then school started and then her personality took a complete 180. I don't have any classes with her this semester, so I see her in the hallway between some classes and I walk her to one of them. She used to be super perky and happy and now she acts like she hates me when she sees me. I sit outside of some of her classes and talk to her about things before class, and I try and just play with her hands and be all flirty but she literally will hold her hands so I can't do it. It's embarrassing because she makes me look like an idiot, I feel like some loser around her. She jokes and laughs with her friends, and then I'll walk up and she'll ignore me and just keep talking to her friends. It's insane. No hello, no nothing. Her friends and I talk more then me and her do. I'll hold my hand out or put my arm up as a gesture for her to come walk by me or hold my hand, but she'll just deny it and keep walking. It's a joke with my friends how my girlfriend hates me. The only reason I haven't broken up with her yet, is the fact that she acts pretty normal and tells me how she likes me and blah blah blah over text and snapchat. 

She'll occasionally act like she's actually my girlfriend, but that's only after I complain about how she's not holding my hand or doing any of that mushy dumb stuff. I just find it really stupid how I have to rat her out for her to start acting like she wants to be around me. I've brought it up plenty of times before, and her excuse is "I'm just not like that. I'm not gonna change for anyone." I feel like if I bring it up again it will be just too much. I've talked about it so much and really can't figure out how a sane human can act this way. She's causing me so much stress and I've honestly lost feelings. It pisses me off because I know she's a great girl, and I know how she used to act and I'm just hanging onto that.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Basically, my great girlfriend turned into a shitty one in the span of two months. I don't know what to do.