<human>: Boyfriend (19) and I (20) are both more mature than our friends our age. We had a talk of being monogamous and we had rules in our relationship. We are together for a year and a half.

Maybe people from US and such will see this as possessive or controlling but it's both reasonable and fine in my culture to expect your partner to not dance with the gender they are attracted to. In this case, women. 

Last night, my boyfriend went to his office party. He said he would leave around 10 PM but he stayed til 3 AM. During the night, we were texting. He asked me if it's ok to brag about me to his coworkers (apparently they were talking about their partners) and I was like yeah go for it. After a night of bragging, I went to bed. Please do not forget that I am currently visiting my family in an another country. 

Well. I went to bed and now I woke up to a message from him about how he spent the entire night with an another woman, talking very closely and also dancing with her too. By our rules, this is not acceptable. If I did this, he would consider this cheating.

I am on the verge of crying and honestly don't know what to do. I moved to his country to study, because we were long distance. I left behind my family and my dreams to be just with him. At the moment I feel like he could be trickle-truthing but to be honest I am really really confused. I trusted him and even encouraged him to go to the party, he was over-drinking, and I just told him to be careful...

I have a ticket to go back to his country this Wednesday, although I feel like I can't go anymore. Please help me.

I am really sorry if this comes off as possessive but this is seriously how it is in our countries.

Give me a shortened version of the text
<bot>: Boyfriend went to office party last night. Today I woke up to a text of him confessing about dancing and spending time closely with an another woman after we agreed that this is cheating.