How to discover is someone you like SO MUCH is for you? That's a big dilemma.
First of all it is so important to be strong enough to play with this situation because u may broke yourself down by making illusions. If you like a friend but you think the chances of something serious are impossible then quit. If you have a decent amount of possibilites around you, GO FOR IT.. The worst thing that can happen is rejection, and personally.. i'm a professional reject, so why not handle another one?
There are lots of factors than may help you find out if he/she likes you, some of them are: body language, communication and connection. If you receive good vibe with at least one of these factors then you should keep trying because he/she may like you.. but still, don't make illusions. Yesterday, I was talking to a close friend about this topic because i secretly like someone (shut up haha) and my friend told me something that shocked me out: "Whatever you don't say, it rots and gets worst".. So, you decide.. SPEAK OR LET IT KILL U INSIDE! :) Good luck and have a nice week!