Help! I like a guy and do what to do

I am in total love with this guy that I snap chat on a daily and he doesn’t like me in that way but I can’t ever get him off my mind. He is so sweet so nice and is just amazing I want him so bad but I don’t know how to make him like me, when I send him ‘Xx’ he rarely puts them back. I don’t know what to do does anyone have any advice, ty xx