honest truth here: I personally wouldnt ever cheat on a girlfriend but if he has a track record it makes it hard to trust....basically all ya got to go on here is instinct....but to help i would say this....if things arent "hot" anymore work with him to figure out why and then try to spice things back up a bit....if he cheats its prolly because he wants what he isnt gettin from the relationship....that doesnt make it right by any means so dont get me wrong....but maybe if things were "hot" again he wouldnt even consider it! Just an idea....best of luck to ya
i hate being in yer spot....its a horrible feeling :(