<human>: We had a great start (like many), for the first year and half we were on fire, loving life and each other. We had a few rough patches but always recovered. A few months ago we had a break up for a day but got back together the next day. It mainly stemmed from a mutual lack of passion. We recently were going through the same pattern of me not feeling 100%, viewing her as needy sometimes. She wanted to talk and I felt a combination of dread and excitement as part of me wanted to end it as well. She was and is my first love. I also sometimes worried about growing old with her and regretting not expanding my horizons. Now, I feel completely different, but this is mostly from the break-up I assume.

We both decided to break it off this Sunday and I feel like absolute garbage. I feel like I had such a great relationship but I just kept focusing on keeping this awesome girl as opposed to loving her. I don't want to put her through more heartache by risking trying again and having it blow up. I talked to her today and she seemed to be doing better. Which, on paper, is fantastic! But internally it was like a twisting dagger. The idea that she could eventually move on fills me with sadness, rage and regret. I want to tell her what I think I did wrong and try to work on it, but I don't know if this is selfish of me.

Can you summarize the given text in a few sentences?
<bot>: Broke up this Monday, feel like garbage. I want to fix things but I don't know if it's selfish of me.