Need a place to vent.

Since my miscarriage it seems like my boyfriend wants nothing to do with me. Except when we have sex. Why? I don’t understand. I just need someone to be there for me and it’s like he’s isolated hisself. I understand every body grieves differently but the day I passed the baby he had people at the house and stayed outside all day. I had to deal with it on my own. It’s like he blames me or just doesn’t want me. I just don’t understand what I did.