I slept with guy who's in a committed relationship

Me met in October 2024 and since then we just text each other when we're up for sex. Today we met after 2 months..and we had an amazing session..after that we went out for dinner and while eating he told me that he's in a relationship and seriously feels for her and that now he regrets cheating on her. At first I was shocked and said things to he and asked him to drop me back after we're done eating. But after the dinner I asked him for another round and he gladly agreed. After dropping me back home he asked to meet again as his girlfriend is out of town for a week and I accepted.

Now coming back to my senses I deeply regret everything. What makes me feel more sad is that even after knowing everything I still asked for more. Now the blame is on both of us.

I ain't asking for sympathy or anything I just wanted to get this out of my chest. Also, suggestions for how to move on from the fact that I'm now "that bitch" .