What is my secret crush ( my gym trainer )doing?

I have feelings for him,for about two-two and a half months now,and no,it'c not conected to his looks only, I developed feelings against my will and I keep it hidden,because there are many issues why we cant be together besides him being my trainer..anywho,I think he has feelings as well ( long story ) anywho...he doesn't let any other guy in the gym approach me,if they ask him to introduce me to them ( if a guy likes me ) he would say ''no'' , and subtly he makes it so no other guy approaches me,or I had a situation where a guy was hitting on me and even mildly stalking me and I complained to him ( but it was a small complaint,just to let him know,and I even told him no to tell the guy anything,that I will tell him when I find the time and that its not even urgent ) and I noticed in two-three days...the guy that was hitting on me/semi stalking me runs from me,he doesnt even dare to look in my eyes and just..in general when guys want to get with me he kind of..subtly forbids it lol ...why?