You ought to start dating him, but not simply to use him as a holiday boyfriend...Go out with him and see if the chemistry can develop. After all, you're accustomed to thinking of him as a coworker, an acquaintance, at the most a friend -- perhaps when you're actually dating, you'll see another side of him that will make the sparks fly. If so, then full steam ahead, destination Christmas. If not, then by no means should you string him along simply for the convenience of having someone to kiss under the mistletoe -- that would be using him, and taking advantage of his interest in you to serve your selfish purposes...

What's wrong with casual dating?..Many many couples who thought they were only casually dating eventually tied the knot. Love CAN grow yknow...
..
C...
Dating Angie...

Dont' do it just to have a holiday boyfriend, that's not fair to him. And also, think of all the parties you'll be going to with potential guys you will legitimately like. Bring your own mistletoe if necessary...