His friends are watching me?

I attend this gym where I go most days. There's this guy who is in his 40s who I think likes me but has never spoken to me. He gives a lot of eye contact and stops working out whenever I'm around. Always putting himself in positions where he can see me from across the gym. He will stop working out and chat with his many friends the whole time and watch me workout. I have a sense he has told them all he might like me. A few times I caught him staring when I wasn't looking and he looked away in frustration. He's watched me drive out of the parking lot and quickly got out his car and leaned on it to watch me drive away. But recently I have found he sends his friends to workout near me. I know his friends faces now over time and it's the same guys. One of them isn't descreet and always gives me a lot of eye contact and even smiled one time. When he isn't at the gym and his friends are there it feels like they follow me around the gym or workout in close proximity to keep tabs on me. Ex I was on the treadmill and one of his friends was on the opposite side of gym working out and next thing I know he's near me and sitting on a machine not doing anything. Whenever they are around they stare. I'm not conceited, it's just a feeling I'm picking up and yeah I'm not sure if this is normal behavior or it's obsessive. I don't even know why he would even like me, I don't feel like I would be his type.

His friends are watching me?
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