I don't know what to do..

My daughter will be 3 months January 5th. My boyfriend (her dad) has recently wanted nothing to do with me. He used to want to be all over me but now, he hasn't so much as kissed or hugged me in over a week. I feel so alone. I'm a stay at home mom which I knew would be kinda lonely but still. I feel like everything is going downhill and I have no control over it.