he won’t leave me alone

So i’ve been in a relationship with a guy for the past 2 years. he’s cheated physically twice, he calls me every name you can think of, he’s texted other females at least once a month throughout the whole thing and yes i know it’s dumb that i stayed, he’s also put his hands on me in front of my sonhowever after all his mistakes i’ve finally lost feelings for him, now that i’ve lost feelings he is acting and doing everything right and doesn’t want to leave me. he tries to gaslight me and tell me im wrong for trying to talk to other people. he’s caught me texting other guys but I’ve told him multiple times the relationship is not what i want anymore. but he still tries to stay around, i met another guy and want to pursue him. is it wrong to pursue the other guy? idk why im feeling so much guilt even tho ive been trying to move on.