why do i feel so guilty? we’re broken up.

pluto

so me and my now ex just ended our 3 year relationship and i’ve been just going out with my friends and trying to have a good time and i ended up hooking up w someone and now i feel so guilty. it might’ve been way too soon but it was what i wanted in the moment. he’d be so hurt to find this out. but we are broken up and it was mutual but it still hurts so bad. am i a bad person? is it okay for me to move on but also feel guilty? or am i making mistakes? i’ve been so hard on myself and this is making it worse. i try to just accept who i am right now but the self sabotage is real. part of me wants to tell him to be honest but also… is it his business? ugh idk