RANT: homesick

I always dreamed of moving out since I lived in a unstable home. Once it happened, I remember being homesick, like severely. I've cried to my family when they left and on facetime too. I cried to new friends I met (which was embarrassing).The friends I've made in the city, that have moved far, say they're not homesick. Sure, they have unstable home lives, but I did too and I miss it. Don't get me wrong, I do not miss what happened at home, but I miss the people. My two close friends, my mom, and siblings. I miss them all. School has been hard because I'm doing 6 courses and I'm about to start my part-time job on Tuesday. I feel like a grown up and I hate this feeling. I miss being a kid, I miss home. Does anyone feel like this? Why do I feel like this?