Me [21 M] with my [21 M/F] of 2 months, cheated on me when blackout drunk, called me immediately

It's pretty serious, but she told you right away. Much respect for that. There are people out there who actually want a relationship and make a mistake, and then there are people who pretend to actually want a relationship and make plenty of mistakes if they are even mistakes at all... She sounds like the former, and I had the unlucky experience of dating the latter. she was the last person I expected to be fake since she was so sweet and sincere and caring, she even would volunteer her time at the hospital to spend time with mental patients who had no one else to visit them. She was bisexual and had this one friend who she would constantly hang out with, I don't know what she saw in this person because she was a really rude and inconsiderate individual, often I would come home from work to see the two of them hanging out at my place. And never once had a good experience with this friend of hers, the first time I met them I was really uncomfortable because it felt like I wasn't even in the room and my ex was all flirty and sitting next to her doing things to her that she should have been doing to me. I wouldn't be surprised if they were fucking and then the other girl put an end to it, because one day I had to be invisible again well my ex was upset over being rejected... Supposedly nothing was even said and it was all just flirting and in my ex's imagination, but she was way too upset for me to believe that. She also had a tremendous history of lying, I tried to support her and encourage her and asked her to be honest with me, she was in her last year of university with a reduced course load of only three classes a semester and ended up failing all of them except for one... Meanwhile I had 5 in both semesters and managed to pass them all with above an 80 average. she then met some new girl at work who she told me nothing about, slept over at her place one night when she was expecting to come back and see me... So after working till 2 and closing a kitchen and being lonely all night, I had to imagine her in the arms of someone else. I had given her the okay to experiment sexually with women, showing great concerns about her developing feelings. Realistically I didn't want her to promise not to, I just wanted to see an effort or desire for her not to, but there was none. She ended up coming to grab her things when I tried to tell her how upset I was and how much I needed her to try and make me feel better, and ended things without communicating at all. Hopefully you never experienced anything or anyone like this. Best of luck for the both of you, you won't find someone perfect but it's not often you will find someone sincere.

/r/relationships Thread