Bad Boy Trouble

Ok ladies. Help. I found out that my guy tried to cheat on his last gf. Talks very rudely to girls and definitely sexualizes them. Stares at butts whenever he gets the chance (not mine) and he tried to hit up a girl a couple weeks ago while we are dating. Help? I'm currently at his home with him in a different state...he took me home for the holidays...I can't look at him the same let alone pretend things are fine around the fam