Emotionally Abusive Relationships

Christa
About a month ago, after being with my first real boyfriend for almost 3 years, I finally broke up with him because I gained feelings for someone else. But here is why.
Everything was fine in the beginning. But then he started controlling me, blaming me for everything, threatened me, begged me to do things and would get upset if I wouldn't..
I put up with it for almost 3 years. I started to become close friends with this other guy. He was always there for me and never failed to make me smile on my darkest days. He has seen me at my worst, physically and mentally.
My parents strongly hated my last boyfriend. I didn't want to listen to them, because love can blind you.
He breakup was so hard.. My anxiety was horrible because all he did was make me feel like crap through the whole process, called me a hoe, and told me he hoped I would get my heart broken..
But thanks to my new boyfriend, I've never been happier in my life and I feel like I am on top of the world.
But sadly, I bring up things he has done to me, which makes me insecure and makes me act and feel a certain way with things.. I'm constantly apologizing, and always wanting to give my new bf his guy time because my last one always wanted his space..
I have so many demons and mental scars that I need to get rid of.. He has helped me with everything and is by my side through every step, but I want these thoughts and feelings to go away..
Does anybody have tips to help or would like to share their stories? I in a way feel like I am the only one, because not many people seem to understand my situation..