How to know that he likes you from his friend behaviour?

I’ve a crush on my guy friend and we are in a group of friends, however I’ve noticed couple of times that my other guy friend tease him about me.

one time we were walking ahead of them while talking and this other guy friend punched him from the back and laughed and then my crush said”you haven’t done that since a while”
another time we were sitting next to each other and he stared at him until he noticed him then looked at me and smile to him.

also he told me once on occasion where my crush wasn’t there”there’s someone keeps his eyes on you, do you know him?”I said no and he didn’t tell me and I don’t know if he was hinting to my crush. I also noticed that he doesn’t feel comfortable with me and avoids interacting with me when this friend who teases him is around.

is all these mean anything? I don’t want to be delusional

How to know that he likes you from his friend behaviour?
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