Do I tell my boyfriend?

So my boyfriend is out of town and I Was with his bestfriend and My bestfriend and we got drunk, very drunk. I was laying down on my bed and my boyfriends bestfriend laid next to and I was cold so I had one leg on him and said your knee is warm and put my arm over his stomach (I was drunk) and like 5 seconds went by and his friend pushed me off and we went and made food to sober up. Should I tell my boyfriend this? me and his bestfriend agreed and said it never happened and no one needs to know. I feel bad tho and I also feel it's not a big deal at all but my boyfriend has extreme issues when it comes to he constantly thinks one day I'll leave him for someone else due to his anxiety and depression. I know that If I told my boyfriend he will never stop bringing it up. I'm only 16 and this is my first serious relationship. The guy I'm with I lost my virginity too and I'm in love with him. there is nothing I'm more afraid of then losing him.