The fitness instructor liked your performance.
Judging from your description, he really likes you and even falls in love with you. In my opinion, the uncertain thing he said to you should be to confess to you. What he said is uncertain. First, he didn't have enough courage to confess to you. Second, he is not sure about your feelings for him ... judging from his behavior, his heart should be very fragile. His ability to resist blows is very poor ... and in this psychological situation, he suddenly saw you and others, so he collapsed in an instant ... His indifference to you is to cover up his own pain. He is afraid that you will see pain, so he avoids his eyes ... Besides, I want you to know that if a person likes you, he will pay great attention to you, so it is not surprising that he sees you talking to other coaches. ....