He is acting extremely childish. His behaviour towards you at the office was totally unacceptable... and now he's sulking because he got called on it. It sounds like he's passively aggressively trying to get a reaction from you... trying to make YOU feel bad. Don't give him that satisfaction. Try not to let it bother you. You did the right thing. I probably WOULD have filed a sexual harassment claim against him especially since he has done the same thing to other women and didn't learn his lesson, but that's just me. You did what you felt was right at the time.

He did something wrong and you did nothing wrong. His romantic overtures towards you were unacceptable and unprofessional and his current behaviour is unprofessional too. It's only making him look bad. That's on him.

"I am very friendly by nature and ppl always misread this to be flirtatious."

From this comment, it sounds to me like you might be putting part of the blame on yourself for what happened. Please don't blame yourself. I am a very friendly person too. We have every right to be friendly people. Reasonable people understand that friendliness in a professional setting is just that -- friendlinesss. It is NOT an invitation for hugs and kisses. His behaviour towards you was completely inappropriate and uncalled for. You didn't ASK FOR IT by being friendly.

Try not to waste any more of your time thinking about him. He's not worth your energy. He needs to grow up and learn how to have respectful, professional relationships with female colleagues.