If this guy didn’t like me why did he get so upset about this?

I’d like opinions about this please- so I was friends with a guy for years and we would flirt and talk, he told his friends he liked me but when I asked him out he rejected me.
When he moved away we lost contact but then he wanted to friend me again after a few years.
We got talking again but he started to ignore me and when I questioned him he revealed he’s married, I unfriended him and he sent me a message all angry about it…he said he didn’t want to play games and I’ve got the issue with being just friends. Later on he apologised and he wants us to just leave things as they are for now, so we aren’t friends anymore…why did he get so angry though, it’s not as if he likes me?

If this guy didn’t like me why did he get so upset about this?
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