I told my mom how jealous I am of my half siblings and now she won't stop crying.😔😨

I told my mom how jealous I am of my half siblings and now she won't stop crying. I’m 16 and was born to my mom when she was 15, and I've never known my real dad. My mom didn't drop out of school or anything. In the year after I was born, she started dating Jack, and when they went to university, I got left behind with my grandparents. Mom and Jack got good degrees, got married, and moved to a city in Vancouver. My mom's always been in my life. She would still come home every weekend just to cuddle with me and would always give me these nicknames, but calling me her 'special guy' would be her favorite one. She'd always bring me back presents and gifts and spend the whole time playing with me. Jack wouldn't always come with her, but it was always fun when he would. He's taken me fishing with him a lot of times, and we even went camping for two weeks together once. But when I was 10, my mom and Jack had a daughter and then another girl three years ago. I don't really know them, especially because my mom stopped coming over as much after they were born. We don't cuddle anymore, no more gifts, and the worst part is she doesn't come to my games anymore. It was okay with me before because they still had a spare room in their house, and I could go there when it's time for university. Yesterday, my mom FaceTimed and said that she was going to have another baby and it was a boy. And now she'd have two special guys. I guess she saw how sour my face was because she asked what’s wrong.