Why would a hug turn into a handshake?

I know I should just ask him, but maybe I could get a little insight first.

my crush and I interact often. I catch him staring a lot, and have had people tell me they think he likes me. Well, awhile back he initiated a hug before leaving. He did this every time we’d see each other. Then one day we were leaving and I initiated the hug first. My friend who saw this said he looked embarrassed. Now he doesn’t initiate a hug and before I can he sticks his hand out for a hand shake. I started to avoid him but he will seek me out to greet me or converse a bit. But the hugs were nice.. now it feels like we are just business associates. lol

I'm worried I may have creeped him out.

any insight from anyone who has experienced similar? lol

Why would a hug turn into a handshake?
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