I'm in love with someone far away and who doesn't know me. How can this work out?

First things first, he makes YouTube videos. That's how I first noticed him. He is naturally funny which is a trait I really look for in people. At first I didn't feel anything different than I felt when watching other YouTuber's videos. But after a couple of weeks, during which I had seen per say 10-15 of his videos, something started changing inside me. Suddenly I am feeling this constant warmth towards this person. I literally have butterflies in my stomach every time I just think of him (for Christ's sake I also keep blushing like a ten year old). The thing is that I have never ever felt this way before, provided I dated one to two people in my life, (I'm 19) but that's it. Nothing more.
At the beginning I kept thinking to myself : "you're just fangirling. Don't think it's anything more than that." But weeks later I'm feeling this massive amount of new feelings that hit me like waves. And frankly this creeps me out. I strongly believe this is not an obsession since I dont act like the 10 year olds pleading for his follow on every social media website and because its been nearly 3-4 weeks and I just can't get him out of my thoughts. I sometimes think about how it would be to be with him, to have a walk with him. And then I land back to earth 'cause here lies the problem: he lives in the U.S. and I live in Europe and I strongly believe that he doesn't even know I exist. So how do I cope with all these feelings and moreover how do I get to talk to him? Thank you in advance.