Tell them, simply have a conversation with them, ask them if they would like to get together sometime, bring them something that you know that they would like....I dunno get creative to get their attention
If you dont like a person that likes you, you should let them know. But do it politely because you can really hurt them if said wrong.
If you already know someone is not interested in you it is best to let them be as they won't change their minds.
You could tell him or send him a note or something like that.
If you like someone it should never matter what anyone else thinks but you. Don't allow others to dictate the way you should act or be - be yourself and do what you want and think is right. If you this person let them know.
You don't want to talk to him or her... but you like them? Um... probably not a good sign. If you like someone, you should definitely go and talk to them - start a converstaion and get to know them.
You can let him know you like him. Dreaming of someone you like is normal. A lot of females have done it.
Let them know how you feel before it's too late and they are taken.
Absolutely. I know it is cliche, but it really does take time. I know right now it feels like you can't let go but you just have to let yourself feel those emotions and know that you will let go when you are ready to.
Tell them your feelings. I'm sure they will appreciate your honesty.
Be straight forward, honest, polite and let them know truthfully how you feel.
Simple, a note on the desk, or a casual "lunch break"
just tell them or by telling one of your friends tell him or her..=]