This issue reminds me a lot trying to get over exes. I'll see their name somewhere or anything that reminds me of them and it brings me down. What helps the most is time going by. 2017 is not super long ago.

Other than that the secret for me is to try to move on when I get those reminders. Try not to dwell on them. That too, gets easier with time. So I see reminders and it annoys me but I'm able to usually move my thoughts along pretty quickly and if I can't I try to push them back and focus on other stuff. So the thoughts may stay but I try to ignore them. Sometimes it's easier than other times but it's way better than it used to be.

I dunno if this helps you but it's what came to mind when I read your post.