Uhm what now?

My crush doesn’t like me back, and I’m wondering what to do now.... I feel like I have to cry, but I don’t have any tears. However when I’m around him I do get tears. He always looks people in the eyes, and I’m scared he’ll see me tears and get sad. The last thing I want is to have him sad. I’m sad and mad. I’m mad because his mood swings suck! One day he is happy and then five minutes later he is mad. What do I do? Any advice?