3 year anniversary...What should I do?

So today is supposed to be my 3 year anniversary with my boyfriend. Thing is we've spent a decent amount of it kinda off and on. A month ago he asked if we were still calling the 17th 3 years. We kinda laughed about it but didn't actually say yes or no.

I saw him Monday and he didnt say anything about it but he said he was having a rough week because of some family stuff. He never forgets these kinds of things but I'm wondering if maybe he did or if he just doesn't consider this our anniversary?

Two people have said to just tell him happy anniversary but I don't know. What should I do?