New Relationship Struggles

Hi everyone, I've never used this before but I think it might be good to get this off my chest and talk with someone about. I've recently begun a new relationship with someone, we've only been dating for a week but we're seeing each other for 3 months beforehand.
Anyhow, I'm really struggling, I've found myself crying on multiple occasions purely because I don't think I'm good enough for him, or that he probably doesn't even like me or he'll just leave me eventually or most recently that he doesn't miss me or feel the way I do about him.
My past relationships have been super toxic and emotionally abusive and my father has a history of cheating.
So overall my inecurities regarding relationships are super high.
I've spoken with my new partner on multiple Occassions about how I feel and have cried in front of him already telling him I didn't think he liked me. He's been really great and reassuring, but I'm so worried that I'm overwhelming or annoying him by me thinking this way, but I really don't know how to stop it.
I'm really struggling.