All My Friends Are Leaving

A lot of my friends are graduating soon and I'm really afraid of having to start over again by myself. I've been feeling lonely for a while, and while reading and watching shows temporarily distracts me, I still feel like I don't have people to talk to about this. I have friends, but now that they're leaving it's hard to depend on them. Knowing that I'm somehow going to be even lonelier is scary. I've had an abnormal number of people from high school pass away and it sometimes hits me that I may never see some of these people ever again. I don't know how to explain that kind of loneliness that lives only in your brain, even if you're with friends. Like no one will understand how your mind works.