best friend is pregnant but I can't be happy for her...

Laura • C.C 🔐
I had a miscarriage almost 2 years ago and this year, a bunch of my friends have announced they were pregnant (at 16-17). Today, my best friend facetimed me and showed me her tests. She's 20, and is in a relationship I don't particularly support anymore. She was obviously excited and so was I at first, but then I just felt depressed, sad and sick to my stomach. I was the first of my friends to get pregnant and it was too soon since I was 16, but nevertheless, I was supposed to have a mini baby me and that loss will haunt me forever. I seriously don't know what to do because she keeps telling me I'm gonna be an auntie (we treat each other like sisters) but I can't right now. I don't know if I'll ever feel okay, or if I'll always feel this way until I have another child. Someone please give me some advice if you've ever been this way, because not only am I sad about this, but I feel like an awful shifty person. 
Merry Christmas... 😢
(Definitely love hate this time of the year after what happened)