If a guy likes you, do they make it obvious or not?

What does it mean if a guy shows his abs while he is facing you? Because my crush was facing me in a group and wiped his face with the bottom of his t shirt while he was facing me and not at another time. He also was walking past me and stopped in front of me and that was one of the times that I have been close to him. He has also looked at me.
Also a girl gave me something and he said to her why does she have that when I was right there but he didn't ask me though.

So I don't understand why he did that when he won't respond to my message or follow me on Instagram. Like he talks to other girls and not me but his giving mixed signals. Is he trying to not make it obvious
If a guy likes you, do they make it obvious or not?
Post Opinion