Shared a bed w/ my best friend & her boyfriend & he cuddled with me?

So, I am immensely close with my best friend (we've been best friends our entire lives) and she's been dating her current boyfriend for almost two years.They are a very healthy and loving couple who spend a lot of time together, so naturally the three of us hang out together often, and I have also become very close with him and think of him as an almost brotherly type of figure; I am 100% comfortable around the both of them (together or individually).

Last night I went over to my best friends house to hang out with the both of them, and both me and her boyfriend were sleeping over, which is something that happens quite often. Now normally I would sleep on the sofa or somewhere else (like the floor) while they would both sleep in my best friend's bed, but last night we just kind of collectively decided that we were all comfortable with the idea of all three of us sleeping in the same bed, and decided "Why not?" So yeah, all three of us slept in the same bed, which isn't at all odd in my opinion just because I love the both of them in a platonic way (it's not like it was sexual or anything, is the point).

Okay so the way this was set up was that I would sleep on one side of the bed, my best friend slept on the opposite side, and her boyfriend was in between the two of us. He moves around a lot in his sleep and ended up pretty much spooning me (one of his arms was under my head and the other was around my waist) and to be honest I'm not sure if he realized he was doing it, and I thought maybe he just thought that it was his girlfriend due to the fact that he's used to sleeping in bed with her (I think now maybe that isn't the case, because he did end up turning the other way and cuddling my friend, eventually). He did other things, like scratch my scalp and throw his leg over my body and pull me close to his chest, etc..

And I guess most people would be alarmed by this because obviously that's my best friend's boyfriend, but I wasn't alarmed at all and I actually found it comforting. I liked it, and I don't know if I should feel bad about it. I don't have any interest in pursuing my best friends boyfriend, I'm not interested in him in that sense, I love them together as a couple and I think they're perfect for one another.

Is it normal that this happened, and that I liked it?