Advice

I’ve been with my bf for 3 years. I️ always find girls in his phone.one time I️ found out that he was talking to my ex best friend and ex so I️ blocked them and delete their number he found a way to contact them on Snapchat. While on vacation with I️ had his phone went through it his coworker send him a pic of her boobs,and saying she’s about to shower she want to FaceTime him and he send a dick pic to her. Two weeks ago I️ found out last year he was talking to mad girls on tinder and sliding in their dm calling them beautiful,what they are looking for,and let’s see where things go. He was talking to this other girl about how he miss her and he’s lonely.I️ am fed up but he said he’s done doing that and I️ need to trust him. Should I️?