Not interested but acts jealous

Being possessive isn't the same as being in love however...

He obviously lied about seeing you as a friend, but knew that, for whatever reason, you two couldn't get into a relationship.
Now he might interpret you telling him these things as you teasing him or worse.

There's a guy I'm good friends with, who I was crazy about for a long time, but he wasn't interested in going out with me, even though he told me that he liked me and always sai dhe found me attractive.

He said he 'saw me as a friend' and plus he wasn't staying in the country (he's left now). but the thing is, I've met a new guy who is very nice, and I told my friend about him thinking he'd be happy for me (and probably relieved), but he had a jealous reaction which was weird, and didn't seem happy at all, just jealous..

it's not the first time either. A couple of months ago something happened between me and another guy, but it shouldnt have, and I confided it in my friend, and he asked why on earth I was telling him that and raged at me for about 30 minutes.

When I've said to him that some guys were good-looking like footballers or something, he would joke along with me. However, he's got a very attractive friend, and when I told my friend I found this other guy attractive, he seemed a bit annoyed and said 'yeah well he's got a girlfriend, and he's really in love anyway'.

I don't understand hm at all, he's not interested but gets annoyed when I show interest in other guys. Why do people do this, any explanations? thanks