Yes, really a lot of losses to suffer. People get counseling after suffering even one loss, have you thought about talking to a school counselor, someone at church if you have one, maybe your reg doc can suggest someone to see for talk therapy. You need it, it would help.
Sorry its been such a hard year for you and you are lonely.
Can you get a new kitten? We can never replace the previous one, but we can learn to love a new one again.
Friends your age don't have enough experience in life to understand what you've gone thru, and your resulting depression. Adults often can't handle it either. ]
When you know someone already doesn't "get it", don't beat yourself up over it. Try and continue the friendship by doing whatever activity you used to do that might re-kindle the fun again. You have to work at it, and its not easy when you're depressed.
You must be seeing some doc for the fibro, ? call and make an appt and tell them how you've been feeling and you've been thru way too much emotional losses this past year. I think they may be able to give you a med to get you back on your feet. When you're really, really down, sometimes you just have to do that to regain yourself back again.
Sorry your grandma is dying. This will be another big hurt for you. Start getting some help now.
Hope you will continue to post.
"Do something everyday to make tomorrow better."
"One good change creates another."