<human>: Can you provide a brief overview of the text?

For background my girlfriend (19f) and I (19m) have been going out for about 6 months. A month ago she went on a volunteer trip to another country for 3 weeks. 

On the last night that she was there she said that she got very drunk and some guy started dancing on her and then made out with her. She told me about 5 days after she got back when I came to visit her house (she lives in another state) as she wanted to tell me in person. She seemed very ashamed including telling me that she cried about it the next morning to her friend whom she told about this.

When she told me I was speechless at first but then expressed how I was upset. However, I was to my and her surprise not very angry about it. I really care about her alot and am not sure exactly how I should handle it.

She told me she really doesn't remember much or even how long it was for and for some reason I didn't want to keep asking. 

I am very conflicted and have no idea how to handle this. Sometimes I think about it and I don't really care as long she doesn't do it again but I don't how I can be sure of that. I also don't want this to happen again and get messier.

She told me on a Friday and I stayed till Tuesday night very late and everything was fine the whole time.
<bot>: My girlfriend drunkenly made out with a guy while on a volunteer trip but told me very soon after and I'm not sure how I should feel or act.