Colleague is acting odd?

I’m quite close to one of my younger male colleagues. He’s 27 and I’m 29. We have always got on, have a lot in common and have a lot of banter.

He stares at me quite a lot and we do sort of flirt. We had a heart to heart chat a while a go and I told him about my body dysmorphia. I told him “I believe everyone thinks I’m overweight and unattractive” and he said “trust me, no one thinks that”

He was in a turbulent relationship and I’ve always been there for him and given him advice which he has been grateful for.

He came to my wedding on Saturday and he was quite hostile towards my husband by trying to belittle him. He made me go with him alone to open his present and some random couple thought he was my husband, to which he said, “I should be so lucky”.
He kept giving me loads of hugs and apparently when he did, he nuzzled his face into my hair.
I think we were all very drunk by this point.

Today at work, the first time I’ve seen him since then, he has barely spoken to me.

My husband seems to think he has feelings for me - what do you think? It’s just an odd situation

Colleague is acting odd?
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