Advice needed about this Gemini male coworker #2

So for awhile he had been talking to me about my gym membership ( one I had been paying for monthly but not been going to the gym as I hate to alone) He too use to have a membership a couple years prior to the same gym. One day he was teasing me so badly about me not using the membership and that it was a waste of money that I should just cancel it ( he knew the reason I wasn’t going, as it’s the one thing I rather have someone with me, even if they are not talking much, just like the company) He wouldn’t let up on it, but he said that he understood, as he was the same exact way. This was Friday. Come Monday, we are all doing our stretches in the department before our workday and he comes in and says in front of everyone “Guess what I did this weekend?” Nobody had the correct guess of course. He looks at me and shows the card on his keychain and says ” I got that gym membership so now you will have someone to go with and we are going as soon as possible” …we indeed started that day after work. Fast forward to 2 months later. We made it a weekly plan of working out on Mondays and Wednesdays, today after we were done and walking to our cars he mentions how good he felt and that we should work out a little bit tomorrow after work as well. I also want to mention that while at the gym, there was this guy that had his eye on me, I mentioned this to my coworker while we were there and asked if we could pick machines that were away from this other guy. My coworker, I will call him Gemini teased me about it and of course when we were at work the next day, he couldn’t wait to tell everyone had I had a secret admire at the gym and teased me the hell about this other guy. I told Gemini that I wasn’t interested in this other guy, that he wasn’t my type. Gemini on another day came to me and asked me ” what if he asks you out?” I said I wasn’t interested in this other guy. Gemini wanted to know why. He wasn’t teasing me about it when he was asking all these questions, he seemed to really want to figure out and find out what my type was.

I will also mention that he has also made accounts to play the same online games as I do, after I was telling him about the ones that I play the most and I can’t help but feel like h’es trying to get a stronger connection. He has asked personal things as well, if I live alone or with family or……..trying to see if I am involved with anyone. I am seperated and have made this fact known to him, he und