Just came across this randomly and I see you just posted it!
Never fear, you are not alone. You don't need to apologize in the last paragraph. You have a right to your feelings, whatever they are.
Friends are very important to young people, even to old people. It's easy to feel abandoned. Your friends may be feeling exactly as you do, but don't know what to do about it. This is a learning experience. All your life you will be more sensitive and kind to other people who may be lonely because of the way you feel now. This horrible time in your life will actually make you a better friend to others. It might make you a more in-tune writer.
Come up with all the positive take-aways you can. Listen to more upbeat music, even though you may be drawn to melancholy tunes. Watch positive TV shows and read happy ending books.
You have lots of "virtual" friends here at WDC. We encourage you to keep on writing. Surely this won't go on forever. You'll make new friends. Some of the old will come back, but don't rely on them so much. You are a bright, creative young woman. You will come through this with flying colors, stronger, better. Your former friends just don't realize what they're missing.
I'm sure a lot of people will identify with what you've written.
Technical: The next to last paragraph, you wrote "I've hadn't". What are you trying to say? I didn't maybe?
Just curious, why did you pick the year 11963?