A Lunch Date Gone Wrong

My boyfriend and I went on a lunch date at a roller skating rink. I decided not to skate and to just sit down and draw. I went up to the snack counter and asked for something healthy and all the workers laughed at me. Then my boyfriend and I decided to go and get something sweet to eat. That night my boyfriend took me to the park because he wanted to make a promise under the full moon. He started acting weird because he refused to tell me who he was texting and he kept laughing/manly giggling. I assumed he was cheating on me. He was super cute but I can't stand cheaters. I finally asked him about it and he said he was texting my parents but I knew he was lying. Later I stole/borrowed his phone and found out he was texting my sister. That night I found out he was cheating on me with my sister. He was planning on telling me that night but he decided not to instead.