I am a 23-year-old straight male. My ex-girlfriend and I started dating in high school, when we were both 17, and continued dating until I broke up with her the summer after our freshman year in college because things felt too serious. We continued to have sex, but I blocked out all my feelings for her, while she was open about still wanting to be with me. She started dating someone else sophomore year. I realized then that I still wanted to be with her, and I broke down emotionally and made both our lives difficult while she was dating this new guy.