Do i admit to him, if so, how?Or what else do i do? suggestions?

i go to the gym with my bestfriend bff , i invited the guy i like to go with her and i and he said he would go on that monday at 10:30 and then monday came and he texted "i cant come" and then i was like "ok tell me when you can go". DOUBTING HE WILL; he texted me tuesday that he will go and so we went but he brought his guy friend . great. its like i never went with him because they do weights and we do cardio, but anyways at the gym though he was mocking me because i was on the elliptical and i go really fast and he was imitating me and chuckling, but still like he didn't go with us. then the next day i went to the gym and guess who showed up on their own will; The guy i like with his friend LOL! and i was like omfg -tries not to notice them-. i saw him look my way though. anyways then i go to locker room and when i was walking out towards exit he was going opposite way and he smiled ^_^ i barely noticed though i thought the smile looked like a whatever smile, but then i see my bff jumping of joy; she seemed happier than me HAHA. also, my friend left early that day so i was alone a while and i was on the elliptical and he went on the treadmill next to me and i was just BLASTING my music because i panic. but the treadmill wasn't working and then he left :<. then on Thursday morning i wake up with 5 Facebook notifications, and in my head before i checked i was imagining them from the guy i like, and then there they were , 5 pictures "likes" from my crush, and they are like old pictures from August. i thought i was dreaming. in general days, i do catch him staring a bit but idk, i really don't want to put my hopes up.