Is it normal to cheat on my boyfriend with my ex/bestfriend?

You're all probably thinking just from reading the titled that I'm a hoe for what I did but please, just listen.
Me and my boyfriend have been together for a year. And my ex/bestfriend has a girlfriend. They have been together for a while as well. A little plot twist is that my ex is my boyfriends bestfriend like his bro basically. You are probably thinking why am I dating my exes bestfriend and honestly I wasn't gonna be with my current boyfriend Despite the deep feeling I had for him because of this. But when they both came to talk to me about this matter I gave it a shot and honestly I think it was the best decision I made. I really do love my boyfriend. Over time, being around my ex because of my boyfriend wasn't even bad. He became my bestfriend and I tell him everything and he has help me with my problems when my boyfriend was busy. But what was good eventually turned bad when I started to day dream a little about my ex.
I thought it was a phase and I told my current boyfriend about it and he said it was understandable and didn't get mad at me. And after I told him they stopped which was great cause it felt weird. Then a couple months after that, my boyfriend was out of town, work related and I was talking to my ex/bestfriend and we decided to hang out for a little at his house. His girlfriend at the time wasn't living with him and she doesn't like me for being his ex so he didn't tell her about hanging out with me. So I drove over and I had a bottle of henny on me cause I thought it would be fun to take some shots. And it was, I remember a lot that happened but not how I got home. I was told he took me home and he picked me up the next day so I could get my car back since I was under the influence. It was a crazy night but what happened was that we both were a bit tipsy and I couldn't stay standing so I layed down on him cause my head was hurting. But then I remember just looking in his eyes. I felt something, That I shouldn't be feeling. I think he felt it too because, he was staring back. But the henny got to me and I said let's dance and so we did as we took another shot but I couldn't stand during it so he asked me if I wanted to lay down and I did and I grabbed him and told him to lay down with me and I layed down on top of him. Which was nice I remember and I kissed him on his cheek I guess as a goodnight kiss cause I was tired. And he gave me one back. He held me pretty tight during this and he basically leaned in and we made out. It was shockingly Really good, But we stopped and realized We just cheated on our significant other. We asked eachother how we felt about one another and we both said we have somewhat feeling for eachother. But we decided to leave it at staying friends and to not tell our significant other cause we still loved them a lot. After that when we were sober I asked him again if he was serious about still liking me and he said yea. We both agreed in the end that it was old feeling being brought back by the henny and to keep it between eachother. Which we did, and still remained good friends to eachother and we managed to still hang out with eachother without anything happening. So what I'm asking is, Is it normal to cheat on my boyfriend with my ex whom I still have a little feelings for?