It kinda sounds like you two are growing apart, as young adults often do. I remember when I was 20 or so, I had a friend who was too busy to see me for a while, and when she finally did show up, I was sullen and uncommunicative because I was hurt by her being too busy for me. Ah, immaturity.
My point (and I do have one) is that this is not uncommon for people of your age to find their friendships getting…fluid. Heck, it’s not uncommon at ANY age; we’re just more used to it as we get older. And your friend was a dick for not telling you when the mutual plans changed. Don’t write him out of your life or anything, but don’t forget it, either.
Featherlou, that made me feel so much better because, unlike the supposed friend I complained to today, you acknowedged the fact that he was, indeed, a dick. Thank you.