AIO. My bf might leave me because I cried over my deceased ex

This conversation happened yesterday and two days ago was my ex’s 3rd anniversary of his death. Me and him were best friends since we were 11 and we ended up dating at 16 until 18 when he died. The current guy I’m dating is the first guy I’ve been a relationship in since. And before anyone comes at me saying I’m after getting into a relationship while still having feelings for another person, that isn’t the case at all. I understand my bf can be hurt by what happened but is it really enough for him to leave me over it. I’m kind of lost. Am I AIO or is he??