I met this girl on tinder in college and we saw each other for a few weeks before we officially started dating each other. She told me very early that she and her ex boyfriend of 2.5 years broke up a few weeks before we met and I had a talk with her about how I saw this as a huge red flag and she somehow convinced me that she would never go back to him and how much of a piece of shit he is. Keep in mind that the ex goes to the same college as us and somehow in my chemically imbalanced head I believed her. The first week I knew her she was on her period and the day after it ended I lost my virginity to her. We had sex frequently for the next few weeks almost every other day and we slept in each other’s beds together a few times which made me build a very strong physical connection with her. I could not cum during sex at all during our relationship and she told me how she felt like she couldn’t please me and I said that is wasn’t her because she was very attractive and it was probably me because I do not masturbate at all anymore and I don’t really feel the need to and I have probably desensitized my penis from years of masturbating. I had trouble keeping hard also and she usually had trouble putting it in and had to help me get hard again. We had sex for 3 hours two times and the other times usually lasted an hour at least before we both gave up on making me cum. She also repeatedly told me how attractive I was and how much she loved spending time together and I felt like she was totally telling the truth. In high school I never even kissed a girl let alone date or have sex so all of this coming at once probably messed up the chemicals in my body and blocked me from having a clear head. Eventually once we were officially dating it only lasted a week long until she said she wanted to break up because she felt something was off about our relationship, didn’t have the same feelings for me anymore, had a very strong feeling that the relationship wouldn’t work out, and needed time for herself to figure some stuff out. Now it took me a week to actually realize that there is a 90% chance that she went back to her ex and that is really the only reason we broke up but for the last week my emotions have been very off and I have been depressed over the breakup. I don’t know what to do or how to get it through my head that she has no feelings for me anymore and doesn’t seem to care or show any emotion throughout the breakup because she is probably with her ex boyfriend again, so if anybody could give me advice on what to do or how to stop feeling depressed and angry then please share.