You only dated him 5 months and it wasn’t mostly happy relationship as you fought all the time. Going to his mothers funeral is totally unnecessary and uncalled for. What for? It was a brief dating experience and it’s over.

Were you subconsciously hoping to get together with him? And why did you assume he would be completely alone? Just because he was alone when you called, it doesn’t mean he is always alone. He perhaps was just alone at the time of your phone call. Or maybe he wanted to be alone that one day. You said he is an outgoing person, usually outgoing people know other people.

I am not sure why he informed you about his mother passing, who knows. I’d let him go and block him