So I have been seeing this girl for a little bit, but no official title. We both knew where it was going to lead though, which was an LTR. We would spend the night at eachothers places 3 or four nights a week. We then left for thankgiving break. The sexts were nonstop. Things were great. We get back from thaknsgiving break and we spend the first night together and things seem great. Later, she texts me and says that she wants to be honest with me and tells me she fucked her ex one night when she was drunk over the break. We kinda made up and my rationalization is that we were not officially together. Still like the girl though, so I want it to work out. I'm pretty fuckin pissed though. Should I say, fuck this girl and get out, or since there was no title on the relationship yet, try to make it work? I need some help on the situation because my opinion on the topic is definitely biased. She has already said sorry, that it was a mistake, and that she only wants me, but I still have my reservations. I don't know what to do and need your help. Any advice is much appreciated.