[The One and Only...]

Here's my advice:

Jump on him and have crazy monkey sex.

If you don't, eventually he'll get bolder, you'll stay timid, and in the end he'll fucking yell at you when you're really just teasing him in a flirty way. Then you'll start crying and call him up and tell him that he's going to get beat-up... but he won't say he's sorry, and he won't get beat-up because in truth you still have feelings for him. Things continue to go downhill, as in his confusion he will transform into a boarish ass, and you will become a fine mixture of hatred and desire. And then, after the dust has been settled for months, you will realize that you still have feelings for him when he finds a new woman.

I've been that guy. Don't let it happen. Just jump on him and stick your tongue down his throat so he knows you weren't just playing. Take it from there.