What does it mean when a guy uses a relieved face emoji when he says we have a lot in common?

[Anonymous]

Relieved Face Emoji

I was talking to this guy and we were talking about stuff we like and then he says " lol we have a lot of things in common" with a laughing face emoji, "my head hurts now" and then he texts me the relieved face emoji. Everytime we text he calls me a copycat or keeps saying we have a lot of things in common. I believe I'm reading into this too much but I'm curious

[WalterBlack]

That might be the relieved face emoji, but it makes me think of somone who is blissfully happy.

[stormbreaker06]

Ask him not me