What does it mean when a guy says hi or smiles or blushes when he's talkin to you?

[Amandacupcake]

I like this guy sometimes in the hall we look at eachother as he walkin by he sometimes says hi and sometimes when i talk to him he starts blushin or smiles but what does that mean?

[Bowshots86]

If he is blushing and smiling whenever he sees/talks to you then he definitely likes you.

[MosaicMind]

He thinks you're pretty.

[MJas16]

He likes you ☺️

[Succcesssfulll]

It means he likes you.

[emerald77]

It means he likes you.