my(21M) gf of 4 years accused me of rape and started dating someone soon after breaking up

it was one night after I was drunk and she was sober, she told me in the morning that I forced myself in her when she was trying to sleep, but I was so drunk I don’t remember the night at all. I told her she should break up with me, I don’t remember, but she stayed. We did engage in consensual-non-consensual play a lot, but apparently this was different. A few months after this night she suddenly broke up with me and moved out, told our roomates I raped her, leaving me to pay double rent, stating that the night was the reason. I found out she started dating her classmate she was telling me about very soon after. I just feel so confused