Is it normal that i'm dreading summer because my friend won't be available?

My only close friend who I hang out with is almost never available during the summer. We both go to college and last year I asked him if we could hang out over the summer after our last final exam, and I didn't see him again until the first day of the following fall semester. I heard from him every now and then over the summer, but I did not see him at all because he was always so fucking busy! He had a summer camp job in June and then miss-prioritized in July by choosing to go on vacation with another friend for a week, which I found insulting, even though I know he was not thinking about me when he did it, which was the main problem. I had asked him to hang out and tried to contact him at least once a week. He was so busy that one week he did not respond at all and it made me physically sick. I could not eat well during this time and overall I functioned horribly. The highlight of my week was getting by blood drawn, which means that my week must have really been terrible. I know he had some free days, because it's almost impossible to have a summer without a free day, but he did not attempt to make plans with me at all! It was the worst summer ever in this since. My brother had also recently gotten a job, so he could not take me to the beach. I had almost zero fun last summer. At some points I wanted to die, though not really. I can't and don't want to go through this again in three months for another three months. I just read that hurricane season is in 90 days, which made me realize how close my almost certain torture is. Our last day of finals is May 11! I can't believe how soon this is coming. He MUST hang out with me over the summer, or I may go out of my mind, especially if he chooses other friends over me. Is it normal to dread summer because of this experience?