Is it possible to fall inlove in one day?

Eventhough it's kinda long please read, my family and I went on a vacation to England. I have an asian mother and a british stepdad and I have 4 stepbrothers. After a week, we decided to go to a beach since it was summer in England. The weather was still cold for me tho they call it "Summer". So I was just there sitting in the sand watching the sea and glancing at people. There was a time I got bored and went to the back of the beach where the sun doesn't reach me. I was just there standing, when I saw this really cute blonde guy same age as mine 17 or 18 with light blue eyes in front of me on my left side. And that time I guess he just finished surfing and he was holding a surfboard. I couldn't help not to stare at him especially with those eyes. I have to admit I saw alot of hot/cute guys in England but this guy is something different. To my surprise, he looked back and smiled at me and I felt something like I'm smiling inside and I think this is the first time someone smiled at me and felt something different and I ddn't know he'd actually notice me because I was at the back of him. After a few more minutes, we caught ourselves looking at each other again changing glances. Not to boast or what, I myself is a cute girl too alot of guys confesses to me but this guy is so different. I'm a shy type so I just looked at him and I really can't make the first move to talk to him. It was afternoon that time, and we had to leave in a few mins, my parents and step bros are getting ready to leave. And the cute blonde guy with his family were leaving too. Me and my family went to the upper part where u can see the beach from down, the cute guy was there too, he knows I was there too. He was looking at me but he went to the loo but I had to leave :( . Then that night, I can still remember his pretty smile and his pretty eyes which I adore so much. I totally fell inlove with him in one day and I don't even know this guy. While I was in England we went to the same beach again and was looking around looking for him but he was not there. I don't know if he's the same thinking about me and looking for me. I know this sounds so crazy but until now I still find myself thinking about him and looking for profiles on facebook to search for him and I wish I could go back to that time, and I wished that I talked to him or somehow get his facebook. It makes me really sad coz I'll probably never get to see him again. He is probably the first guy I totally fell inlove with , with just a smile.