Don't really know how I'm feeling

Kinda angry, annoyed, sad, disappointed etc. Not sure which. Just found out that a friend of mine got married on Saturday. We've been friends since we were about 12, she started at school after coming from South Africa and we became close friends, we done everything together. Our family's became friends as well, and were there all through their parents split up etc, we done so much together, usually the 6 of us kids and their father and sometimes mum, and sometimes all four adults as well. I don't really know what I'm feeling, she invited people that we were friends with at high school. My parents aren't bothered by the fact.