Feeling uncertain. I feel like somethings off with my boyfriend I found out he…

Feeling uncertain. I feel like somethings off with my boyfriend I found out he was talking to his ex after he said he wasn’t & was talking to other women, friends & not, inappropriately. now it’s hard to trust but I’m trying he said he’s trying some things but can’t tell me what exactly idk what to do I’m getting frustrated & am not sure if he’s being honest