What should I do about my hubby leaving me and our 3 babies then begs us back?

My hubby and I would have been married 3 years in july. I dated him in high school and ran into him at a bar. We dated for only a month when I got pregnant. I knew he ran around bc he was dating another girl and me at the same time in the beginning. I.also started seeing signs of him being as.compulsive liar. Right before we got married new broke tgat he had been sleeping with gis ex girlfriend. He swore he loved me and it was a mistake. Couple months after our first child he started picking figjts and leaving all weeknd to come back begging for forgivesness. He did that a couple times till one time I found out he wasnt working one weeknd that he was sleeping with another women.right before I got prego with the twins we split up for two weeks and I found out he was partying and hanging with another women. Well he begged me back again, we spilt up months later when I was 5.months prrgo wth the twins. I soon found out he eas dating some yu ounger girl and seeing other women to. Right before the twins wete born he swore he had learned his lesson...not only to run to talk to that same girl while I was in the hospital not mentioning I almost died during labor. So he leaves me at my moms while im still in pain. 2 months aftrr the split he begs me back again. To end up throwing mine and our babies stuff out of the houe 2 months later. 2 weeks after that split he cries and swears he wol seek counceling anf go to church if we take him back. Do I did swearing to him ive had enough and im not taking him back anymore, not only to have a grwat 6 months together he tells me he cant take it anymore and wants a divorve and for us to split,.again?!! Why would a man wjo claims he loves me and the kifds do tjis yo me so many tomes? Whats wrong with me for taking him back and letting him hurt me?