What is the point of standing somebody up?

I finally decided that I was absolutely ready to move on and contacted an old friend through a social networking site that I hadn't talked to in years. I started with just friendly chat through the private message feature and he started with mild flirting. After a few days he asked me to come see him (he lives over an hour away). Given my circumstances, going there makes more sense than him coming here.

We made plans this past Wednesday to get together on Saturday. By Friday he had upped the flirting big time and asked me more than once if he'd still be seeing me Saturday. The big day finally came and I called to let him know I was running late since my son was supposed to be going to his cousin's and they weren't home yet. He was fine with that and when I asked for directions on how to get to his cabin on the lake, he said that it would be better if I just called when I got to the town close to him so he could talk me through how to get there.
When I got to that town and called him, my calls went directly to voicemail. After giving him the benefit of the doubt a lot longer than I should have, I gave up, went for a drive and got back home four hours after I originally left the house.

Low and behold, he finally answered his phone. All he had to say for himself was that he was sorry. When I told him I ended up going for a drive, he asked where. Why would it matter to him?

But I told him where I had gone and that a girlfriend recommended I go to a particular bar & grill restaurant where I was sure to be hit on. I told the scumbag this and that I went but turned right back around and left since I'm not ready to be hit on by random guys. His reply was that it was best I didn't since my soon to be ex-husband might be having me watched and that my divorce could get ugly and cell phone records could be subpoened (he's already been through a bad divorce).

What he doesn't know is that earlier in the day, my soon to be ex and I agreed to file for a simple uncontested divorce. I gave him my blessing to go run around with the tramp he's been seeing ever since he left. The scumbag would have known all of this if he hadn't stood me up.

And it gets worse. After having the nerve to stand me up, he "unfriended" me on the social networking site. What a slap in the face! Today, he called and didn't say anything. He just sat there for a few seconds before hanging up. What was the point?

Did he get cold feet Saturday? Did he think I may end up back with my soon to be ex? Or is he just an ass?

In all the years I've known him, I never would have expected this from him. He knows what I've been through, so why add to it?

I really can't see the point in standing someone up. If you've changed your mind and can't come right out and say it, at least come up with a lame excuse and let everything just fizzle out.