Long distance relationship issue

My girlfriend of a year and I were in a long distance relationship. We both go to college, and are only about two hours apart. In Sept, there were some problems. She has danced with other guys two times which i assume was grinding, but she said she stopped it soon after. This past saturday she said another guy came up to her and made out with her. She said she pushed him away and ran away. I feel like she was all over him, as she can be quite flirty when intoxicated. The guy jumped on the opportunity.

She has told me all of these things, and on all three occasions, she was drinking. Honestly, I wasn’t too hurt, the first two, but after the third i was just frustrated. So i suggested we take a break the first week of October. We have been on break since, and we both have hooked up with others, although i know she has gone further than I have. She is distressed though. She screwed up and she knows it, and I think she wants to get back together. Honestly, i would love to, but i refuse to keep putting up with this if it doesnt change.

Am i being unreasonable/foolish for getting together. I really love this girl, but fear getting hurt again.

Side note - apparently there is this other guy, Total rebound. She says they are just friends and she doesnt want a relationship, and she says she told him this. I dont know what to make of that.

If i give her one last chance, is that fair? She was taken advantage of all three times. Is one more chance too much?

Any advice? thanks in advance