My ex and I were together for 2 years and he broke up with me at the end of December. Two weeks later he had a new girlfriend.

Every so often I get a text from him and usually he ends up telling me he's not over me and he's really confused. Obviously he needed more time between relationships and I told him that. 

Yesterday he told me that he had asked his girlfriend for a week of space while he figured himself out as it was unfair on her that he still missed me. He invited me over to talk and confessed that he missed me, missed having sex with me and still jacked off to my nudes. He confesses that he wonders if hooking up will reignite his feelings for me. He offers a 'purely physical thing' and when I accept starts kissing me immediately. We have sex. It's amazing and he tells me he misses me and then afterwards he starts crying. 

He feels incredibly guilty and like he's cheated on his girlfriend and realises his feelings for me are truly gone. At the time I felt incredibly upset but now I just don't care. I feel more detached from him than ever and more over him than ever. 

Did he really cheat on her though if they were on some sort of break? Am I a bad person for allowing it to happen? Why don't I feel guilty or even more into him than before?
user
ex asked current gf for space. Has sex with me to see if he has feelings for me. Realises he doesn't and cries as he feels like he's cheated. I
assistant
My ex and I were together for 2 years and he broke up with me at the end of December. Two weeks later he had a new girlfriend.

Every so often I get a text from him and usually he ends up telling me he's not over me and he's really confused. Obviously he needed more time between relationships and I told him that. 

Yesterday he told me that he had asked his girlfriend for a week of space while he figured himself out as it was unfair on her that he still missed me. He invited me over to talk and confessed that he missed me, missed having sex with me and still jacked off to my nudes. He confesses that he wonders if hooking up will reignite his feelings for me. He offers a 'purely physical thing' and when I accept starts kissing me immediately. We have sex. It's amazing and he tells me he misses me and then afterwards he starts crying. 

He feels incredibly guilty and like he's cheated on his girlfriend and realises his feelings for me are truly gone. At the time I felt incredibly upset but now I just don't care. I feel more detached from him than ever and more over him than ever. 

Did he really cheat on her though if they were on some sort of break? Am I a bad person for allowing it to happen? Why don't I feel guilty or even more into him than before?
user
Ex's new girlfriend invited him over and he starts hooking up with me. I'm so over him.
assistant