I had my abortion 3 weeks ago now

I had my abortion 3 weeks ago now. I was scared and confused when I found out I was pregnant but after a week of talking to my parents and long term boyfriend I felt like I could do it. I could be a mom. We could do it and have this baby together. My boyfriend felt another way. He didn’t want a baby and said he wasn’t sure if he could be there for me and a baby right now. That was heartbreaking to hear after seeing him as the man I wanted to spend my life with. I never wanted or saw my life being as a single mother and did not want to take a chance that he wouldn’t be there with me for that baby’s life. I want more for myself and my child. I had the abortion and I now feel regret and a lot of sadness of what could have been. This will stay with me forever. I don’t know how to heal. I just want to go back in time and make the choice for me and not him.