Single mom depression

This holiday season is going to be rough. I am a newly single mom to my month old daughter. I see everyones pictures on facebook doing stuff as a family. Going to the pumpkin patch, taking fall pictures, etc..all while im sitting at home taking care of my daughter by myself. When i was pregnant I was so excited to experience the holidays as a family, now im worried about having to share her on the holidays. Ive cried every single night for the past 2 weeks since me and my fiance split up. Its not fair...