advice needed

me and my boyfriend have been together a year, and recently I found out my grandmother is sick, since then I’ve been so upset and feeling numb towards my relationship. I’ve become more sensitive and also it seems when I’m with my boyfriend I can’t feel the emotion of love , it’s only when I’m gone that I miss him. I know I love him , i just don’t feel that lovey emotion. Idk what to do . Is it the relationship, the trauma , or did the trauma ruin the relationship?