How do you determine if you're handsome?

This is actually something I have the most say in!
When I was little, I visited a classmate's house, and my classmate's sister would say, "Why do this kid's eyes look so beautiful?" and couldn't help but touch my face.
When I bought a book at a street-side stall, the shop owner would sigh, "This kid is really good-looking."
After graduating high school, a female classmate showed me her graduation photo and said, "My mom says the guy in this photo is really handsome."
After graduating college and meeting my online girlfriend in person, she asked if I was still in high school. Since then, she has been calling me the innocent high school boy.
Later, when I went to Russia, every time I took photos, the client's daughter would like to lean her head on my shoulder, and before leaving, she would hug me.
If you're truly handsome, you'll hear compliments from a young age all the way through, and you'll become numb to it—that's just how it is.