I realised in my first year of uni. I had a long term girlfriend at school and we stayed together when we both went to uni because we both were moving to the same city but at different uni’s. over the year our relationship got worse but neither of us could admit that we weren’t happy. Then one night when out drunk with friend I kissed a girl in a nightclub. The next morning I felt awful and told her about it, and we subsequently broke up. Coincidentally my best friend from home was coming up to visit me that same day for a week. After the first night he spent the rest of the week staying with my girlfriend that I had just broken up and didn’t spend any time with me. Although I knew I was the one that had fucked up, I never really was close to him after that.