Okay I need opinions stories etc

I’m starting a new relationship after being mentally abused by someone

It’s very hard so I tried to talk to my boyfriend about my past relationship and why I get scared sometimes but is it bad ? He said he loves to hear about me. I freak out a lot but he’s always reminding me I’m loved, we argued today but we made up as soon as possible, on the other hand my ex went 3 days being mad at me and the fighting was constant. I don’t want to make it seem like I’m comparing cause I’m not trying to I just feel like I should be open with my partner!