Whenever someone stares at me, I think he/she likes me?

How naive is that! I'd instantly get the thought that he/she likes me. Then my heart breaks because I thought he/she likes me but he/she doesn't. Anyway, a hottie boy recently moved into my school. I fell in love when I first saw him(That's silly, right?). Then one day, I caught him staring at me. He was staring at me for quite long. When I looked back at him, he quickly turned around. The next day, the same thing happened again but this time, when I looked at him, he didn't turn around, but instead, I turned around, blushing. I found his Facebook and he wrote "Where's that kid's profile?". I thought he pointed that at me. But then today, he didn't even stare at me during the whole day. I stared at him, but he acted as if I was invisible. When we were in canteen, he was walking behind me and I thought I was gonna turn around to intentionally bump him, but instead he walked passed by me as if I wasn't there, he didn't even look at me. Today I feel sad because of that.