What does it mean when a guy says you have really pretty eyes?

Anonymous
So, I was on a bus sitting next to 3 of my friends--2 girls and a guy, and we were just talking. I don't know the guy too well, but I really like him and think he's nice. Anyways, there was an awkward silence and one of my friends was like "let's talk about eyes, eyes are really interesting" and then immediately the guy turned to me and said "you have really pretty eyes. I was thinking about that the whole bus ride but I thought it would be kind of weird if I said that randomly" Then he stared at me for a while and I thanked him and the conversation moved on. Does this mean anything?

oh, and I'll be a senior in high school and he'll be a freshman in college--if that means anything, haha
What does it mean when a guy says you have really pretty eyes?
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