Can you please me?

Okay so my boyfriend's niece's dog got hit by a car and he's really upset about cause his little niece is sad. What should I say i cause never had a pet that got hit by a car or died.. An i'm upset cause he's wishing I was there yet a few weeks ago in April he hurt me by seeing a woman in New York, that he bearly knew. But when I told him he could come see me an there i could hold him he was like never mind just forget said any thing...an that hurt like I'm not worth seeing at all💔 Oh an it didn't work with him an that 32 year old woman.