If there's one thing I've learned over many years and many crushes, it is that you've got to tell people what you feel. Notice that I did not say "confess your undying love" or even "say you like them". Sometimes it's as simple as expressing gratitude for someone's guidance, support, and kindness. Sometimes it's admitting that a friendship really means a lot to you, a mentor really helped you grow, or that a crush makes you feel something new. Whatever it is...say it. It's scary but it is worth it. Nine times out of ten the person will be touched and flattered. Maybe they'll even respond with something that'll surprise you. The words you don't say are what keep you up at night for years after. They're the unspoken words behind your silent tears. The words you never said will haunt you far more than the words you did say. Take it from someone who knows from far too much experience (In both situations).