What does it mean when a guy imitates you?

Not in a rude way.
But this guy who I’m sure there’s mutual liking on both ends, has begun to imitate (I think that’s the right word) me.
Like if I check my phone, he checks his phone.
If I cross my hand, he’ll cross his hand.

I've even realised it online. Like if I post something he’d post something similar.

It’s little things and I don’t think he notices.
What does it mean when a guy imitates you?
Post Opinion