I'm with Pat. I'm very friendly, too, but I will not tolerate sexual harassment. Depending on the guy's (or gal's) actions, I will either give a warning, or immediately report him, or file a lawsuit. I don't consider being asked out sexual harassment, unless I've made it clear I'm not interested, and the person continues. If he's getting "in my space," he'd usually get a warning. But if he's touching me inappropriately, kissing me, or trying to coerce or force me into sex, I'm going over his head and probably filing a lawsuit--especially if I don't feel appropriate action is taken by the management. Kissing on my neck like you describe is crossing the line by far!

As others have stated, and even your boss, this is not the first time he's been reported. Your boss probably spoke to him, which might be why he's so angry, rather than simply your rejection (although that certainly is enough for some guys, too). This is a man who needs serious action taken against him. He will continue victimizing women if someone doesn't do something. He obviously doesn't think much of women, because he doesn't respect them.

MadKitty, I'm glad you've made it clear you won't tolerate him doing this again. In the meantime, let him be a miserable jerk, as long as he doesn't use it to harm you in any way. If he does, tell your boss immediately! Good luck to you.