Search Results: i told him i'll miss him

So I have been with this guy for over 3 years.
He seems really close to his sister. Our relationship was rushed but were not that young. I being 29 and him being 32.
We have two kids together (toddlers).
We decided to take some time apart and he hasn't called his boys at all or anything and they've been begging "see daddy where's daddy?"
He runs to his younger sisters every freaking whim. She wants him he goes. He PREFERS her and his nephew over his boys.
I always thought kids came first.
Well one of our boys had a bad bout of illness and started puking like crazy. Had to rush him in, unfortunately. I told him and he says "busy with my nephew." (If this were me I'd get super worried and rush my butt to my child's aid immediately. After all, I brought them Into this world and their top priority)
His sister recently broke up with her boyfriend and she's been lonely and basically he's been keeping her company for DAYS. He wants to be with her for a week.
He doesn't call his son and tells me to relay messages for him because he's playing video games with his nephew or running errands for his sister ALL the time.
He doesn't respect me at all, he respects her much much more than he respects me and always has. He will go to her every aid and when she calls me a bad mother and a stupid C word he agrees every. Single. Time.
My father is not doing so well and he had the galls to say "well I'm sorry your dad is passing mine already died and its hard." Like he doesn't matter (my dad has gone so far to help my boyfriend out and I think he should have respect for the guy instead of harping on his being ill)
He wanted time away and keeps changing his mind and not wanting to come back. I told him your boys miss you they cry for you they want you home!!! And he says no my sister needs me and I wanna be away from you for a while.
I dont understand this? Its especially hard for me because I've been crying over how t