...wants to date me?

People can often be over-bearing in their persuit of another person. I assume that you know his (or her) intention is to date you. If it's been brought up, you can directly tell them that you are not interested.

If you do not feel comfortable bringing it up, you'll find that "hoping he gets it" will be a long, possibly never-ending, experience.

Being direct is best. You can do it kindly, but you should make it clear. You'll be happier the moment it is over.

You can also drop subtle hints that you think that's bad news. That sorta thing has always kinda creeped me out, ie people who date co-workers. Just sounds like trouble.

Just start flirting with one of his/her friends. U can even dicover that u enjoy it
easy.

One day bring up the topic of a friend of yours who dated a co-worker and both suffered when they broke up - and end it with - ohh i would never think of dating someone at work

of course find a good entry point to this conversation.

Wear an engagement ring!!!!

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ohh là la...!!!!

lol this seems kinda old...but i like michael's suggestion the most.

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Tri nhơn tri diện bất tri tâm.