why he doesnt love me after having kids?

before i had kids w my husband, and i wanted a divorce, hed beg me to stay, and do everything to get me back. but now that i have kids w him, he doesnt care about our marriage anymore. hed say that if i want to leave, i can. he doesnt care about losing me. he said that no one will want me w kids. itd be hard for me to find someone, id either have to choose them or our kids. he also said hes going to fight for the kids, and wont let me go visit them. and if he loses custody, then hes going to disown them and not care about them anymore. he acts like its very easy for him to find someone else who looks like me. and that it wont be easy for me.