Regrets and past trauma

Basically I just need to vent and some advice would be amazing. Almost a year ago I started dating the guy I'm currently with right now, and I can say for a fact that he's the person I want to spend the rest of my life with. However during the first week of our relationship I was in contact with my abusive ex, I told him that I missed him but we can never be together. I know it was so wrong but at the time I felt I needed closure? Now I just feel so regretful. Most of the time I try not to think about it. I know it won't ever make up for what I did but I give my current boyfriend my all. I cook for him, I clean up for him, I help pay his bills and just do a lot such as helping raise my stepson. When we first started dating I was terrified because my ex almost killed me and I definitely didn't give my current boyfriend my all at first. It didn't help the fact that just a couple months before we started dating my ex almost killed me and put me in the hospital, we definitely had a trauma bond. Should I come clean to my current boyfriend? I'm terrified of losing the man who's shown me what true love is like. My abusers ex has also started harassing me again and even hacked my friends *** account and is leaking private conversations and I feel so sad and overwhelmed. The leaked conversations involve me venting about my ex and even being nosey. My abusers ex is extremely obsessed with me and I was even under the process of having a restraining order filed but people tell me it's just unnecessary stress. I just want to let go of that past life and build my home with the love of my life. I don't know what to do or what to say. I'm not the same person I was a year ago.