On a personal note, while you're saying crush and according to analyzing of your post I assume that you don't know him well enough since you're saying it's a crush, meaning you've got feelings for that person while you don't even know what they feel about you or generally know them...
To me it sounds like people use the term like too much. Liking or in other words having some feelings for someone isn't something too easy which comes by a simple sight, and it shouldn't be used so frequently since things don't work that easily and this term isn't something to use too much.
Getting to like someone is basically a process. You get to know this person, their characteristics, their personality, behavior, values, opinions, life, etc. Having done that you get to develop something for that person, "feelings" is an appropriate word to describe that. You analyze everything you get to learn about them and then see if it suits your standards or at least if you get to "like", which basically means accept or adore, what they have to offer you while they're taking part in your life. That's how it goes.
In case they didn't get to like you from first look it doesn't mean that they won't after getting to know you personally and getting to see your characteristics, personality, behavior, etc... At any point after personally knowing each other the feelings may come on the road. It also doesn't mean that they will get to like you. But it isn't as you think it is. It's a bit more complexed.
Communicate with him, get to know him personally, be nice to him, and take it slowly while you're gaining his respect and trust. That should be the best thing you can do.
If the question is about if you and him are meant to be together... That's also another question which strongly differs from liking. In that case, as Murfie said, use different forms of divination to get the best answer you may get.