Im with this guy and i really like him but..?

o well i really like this guy im dating. hes so cute sweet and he walks me to everyone of my cles. well before he started dating me he kept talkin about how he wanted to have with all these girls and he kept hittin other girls s. so my friends don't want me to date him. but ever since we started dating he doesn't do it n-e more now a bunch of my guy friends want to beat him up for no reason. what should i do should i break up with him or should i stay with him