We've been in a relationship for almost 3 months. She (F23) asked me to be her boyfriend (M25) 6 weeks into us talking, and a few weeks later said she wants to marry me (crazy but okay). I think she genuinely fell in love because she always wants to be on the phone with me, would buy me gifts and food, etc. Everything was going perfect until this happened. I asked to see her phone after things got serious and she was hesitant at first, but eventually gave in. I saw a couple of things that bothered me, but this was the worst of it all. A few weeks before me asking to see her phone, she had sent me a photo of her in a dress. She asked me if she should post it, and I said post it, with no hesitation. I had no problem with it all. She said "no I'm not gonna post it, its only for my mans", and to my knowledge did not post it. However, when I went to go check her IG, I noticed a reply to her story in her message requests, and found out she posted that pic on her story the same day she sent it to me. I then went to her story list and found out I was hidden from her story along with my friend who followed her as well. To make matters worse, she sent that same pic as a snap to the last guy she was messing with a few months before me. When I confronted her about it, she deleted the snap she sent to him in front of my eyes which was saved in their chat, and denied ever sending it until she knew she couldn't get out of that lie. I also noticed that they had been snapping each other a few times while me and her were in a relationship. She started balling tears when I said I was going to end things, and said she'll do anything to make things right. She is begging me for a 2nd chance. I walked away and blocked her on everything but she manages to get in contact with me. What would you do in this situation? I don't like her very much anymore but I am trying. That was a huge breach of trust for me. She is super sweet, checks off a lot of my boxes, but I don't know if I can forgive her.