<human>: Can you provide a brief rundown of the text in within 3 sentences?

My boyfriend and I have been dating for over two years. Every year, we go to a 'Misfit-Thanksgiving' with all our friends who live far away from their families. About 9 months ago, my boyfriend and I went through a rough patch in our relationship, so I gave him a one time hall-pass. Last night he came home from work and said that a week and a half ago, he cheated on me with a random girl who showed up at our friends house (the friend who hosts Thanksgiving) uninvited. He then found out last night that she is invited to Thanksgiving dinner tomorrow night. I texted her last night on my boyfriends phone and let her know that my boyfriend has a girlfriend, and that I know what happened and that I have no hard feelings towards her, but that I do not want her to turn this into a big dramatic problem by telling our friends (she is 18). She said she was sorry, and that she has only told one person, and she also wants no drama. I am not mad at my boyfriend, after all, I did give him a hallpass... but I do not know what to do. I feel very cold emotionally, and a bit dazzed and confused. I am not sure how to react meeting her tomorrow.. do I try to befriend her? Do I be nice to her? Do I ignore her? Do I bitch at her? This is one of the weirdest things I have ever had to deal with. 

Reddit... what do?
<bot>: I gave my boyfriend a hall-pass, he used it on a random girl, random girl is coming to a friends dinner party we are attending tomorrow night.