i agree with everyone else, dont talk about him to his family. they'll only resent you and it will get back to him.

you can talk about yourself, but keep it positive. dont give them anything to bring back to him. do not say "its my fault, i did this and this" because if he's ever in the mood and needs something against you he will use it.

theres nothing that says you cant stay friendly with his family, but never expect them to take your side.

"In a ham and eggs breakfast, the hen is involved, but the pig is committed".