I am distressed; what does it mean?

I'm not sure I have never been this physically distraught when there's no actual reason to be. No one is dying. No one is hurt. There is no emergency. But I am conflicted and confused, and I am terrified for that moment tomorrow when I have to leave. I know there are wonderful adventures ahead of me, but I don't want to leave these people, this place, behind. I can't sleep. I can't study, and I desperately need to. But there are too many unspoken words, there always are. There is nothing I can do to communicate how much you mean to me, and there's nothing I can do to preserve today's life and today's love so that it will remain familiar when I return. Things will change, and I hate it.

I need some serenity tonight, some acceptance, some reassurance.

I'll be in California tomorrow, at least physically, but only for a few days. How is this going so fast?