Giving a 2chance

I caught my EX boyfriend trying to cheat on me (physically trying to cheat w someone) was already enough that they were sending messages & being flirty and very disrespectful! I broke up with him, but he makes me feel guilty for not giving him a second chance.. he has been trying none stop & saying lots of things trying to make me see him.. saying how he cannot believe how overnight he means nothing to me, im over here like “dude u were the one disrespecting me while in a relationship” i had already told him cheating I cannot do, because i will never be at peace and i know that sooner or later he’d probably try to do it again although he says he “wants to change to be a better man for me” “that it has been so hard for him” “says how can i be so heartless.”

i know I cannot get over it, but it hurts it hurts to see u have to let the person YOU (me) genuinely loved, that u cared so much about but you just have to because they did not care enough for u to not do that.. he keeps saying it was a mistake, how he lost his best friend and love of his life, he even wrote letters.. & says if i have someone else to tell him (when he said that it did make me mad because im not him I don’t need someone else to leave) idk but im having a very hard time i care for him still & makes my heart ache to know he says the all these things as if im the bad person.. am i the bad person for not wanting to talk to him & give him a 2nd chance am I really that bad of a person?

I have a feeling he might end up looking for his ex because from the looks of it i think she must have actually put up with that kind of behavior but not me, but it hurts knowing that I probably made him at least a a bit of a better man for her or anyone else that will take my place.. because I actually invested time and effort in him, physically & emotionally tried to make him a better man for him to realise what was wrong & right & someone else will probably get the best of him.