Does my crush like me back? Please help!?

Perhaps he has faced rejection problems in the past, making him more cautious to "advances". He might also be facing awkwardness. Furthermore, the age difference for his point of view might be thinking of you as an elder person that is too open on inviting him. He might be a guy that really depends on his image a lot, and peers might be taunting him for "hanging out" with an older girl, hence the refrain from spending time with you more. If his attitude persists despite your best attempts to make a connection, then it's time to stand up to him. Coz' if he doesn't appreciate you, he doesn't deserve you.