I miss him but he cheated what do i do?

okaay i broke up with my boyfriend cozz 3 saturdays ago he kissed his ex (we were goin out) but i stayed with him cozz i love him and 2 saturdays ago he fingered my friend (we were goin out) so then i broke up with him but i really do like him and he said i was the best tng that ever happened to him and he said he wants me back and he wont cheat ever again but he said that then he fingered my friend should i get back with him and trust him ? i mean i really like him acc i think im in love with him what do i do?