What have I done ☹️

Soo I was with someone for 11 years, have children together. Towards the end we decided it wasn’t working. He said because I wasn’t interested in sex it was frustrating for him but I felt like that ‘spark’ wasn’t there. I met someone else, was together for a year I always wanted sex everything was amazing!! But we broke up ( mainly because we didn’t live close) and didn’t talk again... few months later me and my kids dad started to try to work things out 🤷🏻‍♀️. But the other guy started talking again and I can’t stop thinking about him, I want him so bad just the thought of him is 🥵. I’m a horrible person right? I don’t even know what todo.