Have a huge crush on a guy in a relationship

Going to keep this discreet in case. But I recently started going to a new gym and I instantly was attracted to the guy working there. And whenever I was there working out at the same time as me, I noticed he would stare at me or position himself in a way where I was in his frame of view. As time went on I started to really like him a lot and I started to get to know people at the gym and told a few of them that I liked him. I ended up telling one of his coworkers I liked him (HUGE MISTAKE) because she told him and I later found out he has a girlfriend. I think he is flattered that I like him but now I feel extremely embarrassed because all the staff know that I like him and now I want to cancel my membership out of respect to him and out of embarrassment. I’m not sure what to do but I am humiliated.