Feeling Betrayed by a Close Friend

I'm really upset because someone who has been one of my closest friends for a decade now. I'm his longest running friendship to this day but I feel like he has been treating me like a second class citizen as of lately. I have gone out of my way so much to attempt to hang out with him, yet it feels like he just doesn't care at all. We were supposed to hang out the night of New Year's Eve but he had to reschedule for Tuesday. I wasn't thrilled about it, but I didn't give him any flak about it and it was fine. Well, I ask him on Tuesday (01/03) when he's coming and he tells me later that night. Then 6pm rolls around and I ask again and he tells me a few more hours. Then at 10:30pm, I ask if he's still coming and he tells me he has people over and he didn't think he'd be this long. So I text him back, "tell them you have somewhere to be," and he just leaves my message on read. Then from 11pm up to 6am I end up messaging him 2 times and calling him 3 times just wondering if and when he's coming but he never answered. I haven't messaged or called him any more after that. It just hurts so much that he blew me off like that, but even more so the fact that he won't even dignify me with a response.