I think you flipped the switch off in your mind because you knew there was no possibility of a relationship with him and when he didn't invite you, you were hurt to feel that you felt more for him than he probably felt for you. His not returning your recent call means either he didn't hear your message, he does have angry feelings toward you, or he just thinks it's best not to encourage any 'friendship' with a woman he finds attractive.

I hope this helps.