A close friend of mine is friends with someone who assaulted me

I was technically sexually assaulted by a girl. I say technically because while what she did would 100% constitute as SA, I didn't really have an opinion about it. I was neither happy about it nor distraught, it just happened and it took me a while to even realise I was SA'ed, after which i was like "huh wow, weird." Now that was a few years ago, i've only told this to one close female friend of mine, who was all "sorry this happened to you that's so bad" etc etc. Today i saw her commenting so positively on that same girl's instagram. And they aren't even that good friends.

I am not angry at her or anything, how could I since I myself was not fazed much by it, i can still talk completely normally with that girl if we ever happen to cross paths again. BUT this whole incident still makes me feel funny, because this is NOT what i would've done at. all. if a friend of mine told me someone had SA'ed her. IT would've been way too serious for me and an eternal enmity with the abuser. idk