Is it normal to love someone who you had sexual relations with?

When I started to go to church, I met a guy. Let's call him E.M. I kinda liked E.M. A few weeks after I started, I was alone, and he came up to me and said, "Sit in my lap." This was a few years ago and we were still teenagers. Ok, he told me that and I said no. He left me alone for a while, then one day, he called me into this room, and he locked the door behind him. Then we did some stuff... Or he did stuff to me. Well, this continued on for a while. A few months later, he called me to be alone. Then he told me, "I'm sorry for what I did. I was stupid." That sent a shock through me. I asked him,"is it because I'm gothic?"
"No."
"Is it because I have a boyfriend?," (i had a boyfriend at this time...)
"No"
"Is it because I could have ended up pregnant?"
"Yes"
He told me that he didn't want to have a baby. I told him that it was impossible for me to have a baby because I was on my menstrual. So, is it normal that I had a sexual relationship with a boy and then fall madly in love with him?