Am I self sabotaging myself?

I been dating this guy for a month or 2 now and since the first link we been together latched to the hip everyday, but before we even started talking I know he was known as a hoe sleeping around and messing with multiple women but he been saying he’s trying to settle down with me so I always have a back thought like he’s cheating , I just need some advice what I should do he said he’s been sleeping with me and only me and it’s getting annoying asking him about others but I can’t stop having a back thought in my head

Am I self sabotaging myself?
Post Opinion