Just needed a rant

Just needed to get this off my chest. This year is our first year being a family of 4. We were suppose to go on holiday 23rd-30th December with all of my partners family. Unfortunately me and my baby boy cannot go now because he’s not fit to fly. I’ve told my partner he still needs to go because it’s not fair on my little girl letting her down because she’s so excited. I’m now feeling so low and upset because I’ve never been away from my little girl and it’s also Christmas. I already feel so lost and every time I think about them going away it’s upsetting me.