Feeling guilty after abusive relationship

The title says it all; it's been six months and now I'm with someone who is extremely caring and I trust and is constantly showing me what relationships are supposed to look like which is so amazing. Just facing the contrast now, I'm feeling stupid for staying with my ex for so long, and for being heartbroken over him for so long. I'm embarrassed by the things I did for him and embarrassed by how long I was grieving...does anyone relate or have any tips for dealing with embarrassment and guilt post-abuse? Thanks friends ❤️