Should I tell my guy friend that his friend sexually assaulted me?

I posted the story earlier but it was really long so here’s the condensed version.

I’m friends with a guy who’s friends with the guy who sexually assaulted me. I’m thinking of unfollowing my friend because he makes posts with this guy in them sometimes. The problem with that is that my friend and I talk regularly through social media and I don’t want to just disappear and stop commenting on his stuff because he will think I don’t like him anymore or I’m mad at him.

I can’t stand seeing my abusers face, and seeing him being so happy and living a perfectly normal life even though he assaulted me. I’d rather just not see him ever again.

Before I unfollow my friend, should I tell him why I’m doing it?

Should I tell my guy friend that his friend sexually assaulted me?