You aren’t chasing him to just be friends. You loved the attention and you miss it. Stop measuring your self worth by how many people are attracted to you. Be honest with yourself.
I’m sure he enjoyed the dance as much as you did – but once he crossed the line, he realized that it went too far and he has to have limited contact with you because he has no intention of destroying his current relationship.
Leave him alone. Think about getting a new job. Don’t mingle your job and your romantic life.
Thank you guys for all your replies here, all of you helped me a lot with this issue, clearly I should just get my act together and begin behaving more professional. I guess I’ve learned a lot from my own self-generated circus but only a bit later shall I be able see the results I’m afraid, bc right now it still feels truly unspeakable.