Should I tell my boyfriend?

I’ve been with my bf for a year now. Before him, I was in friends with benefit situation with a guy and recently he messaged me and I’ve told him I have a bf.

He sent me his dick pic but I didn’t respond back to it. There isn’t any emotional attachment between us but I respect him as a friend cause that’s what we were before fwb. I’ve blocked him now and loosing any contact with him. Should I tell my bf about this small incident or just move on and forget about it?