I am hysterical right now

I'm was Taiwan on a vacation with my boyfriend and sister, and I decided to get my hair dyed. After I got my hair dyed, I saw an advertisement on the window. It was about how I could get all the pimples off my face. I reentered the shop and asked to get those pimples off my face. It was another hour and a half before I got back to the hotel. I saw a faint glow and assumed my boyfriend was asleep. I heard scrambling and realized something was terribly wrong. I stormed towards my boyfriend just in time to see him and my sister in action- both fully naked. There was even a used condom on the bedsheets. I couldn't believe it- so I did the best thing I could- punch my boyfriend in the face. "Why?" I screamed, tears streaming down my face. I dragged my suitcase out of the room, and booked a ticket back to America. I'm lonely and depressed right now. I would really appreciate someone to talk to. I still can't believe it.....