Guys, Is there any way to know If a stranger is attracted to me?

Guys, is there any signs a guy find me attractive (we are strangers) never spoken.

There is a guy who goes to my local dog park, I find him really attractive. The only thing I have to go on is that he looks into my eyes everytime I see him.

Are there any signs he might give that he too finds me attractive?

Guys, Is there any way to know If a stranger is attracted to me?
Post Opinion