What does his behaviour towards me mean?

Anonymous
One time I said to his ex that I'm interested in hem which was 6 years ago or so. Afterwards I found out he was not my type and I only liked him as someone who was kind to me. I had no feelings.
I've been with a lot of men, at least for me it was a lot, and I knew back then what and who I liked so I knew it really fast back then that I didn't like him at all.
Years after that I made sure that I don't pay attention to him so he didn't thought I was crazy about him. Even his ex then said, that there are girls who went after him even when he was in a relationship.

Then years after their break up. People around me noticed he always stared at me, said hi nervously around me.. all that.
I just said hi back and avoided lots of places where he was.
Because of another personal reason, I became interested in working out and found a place where they all were so kind.
Unfortunately, I found out he worked out there..
I made sure I didn't talk to him and if I wanted to borrow something in the gym I asked others or I had to ask his friends if someone uses it. They were kind.

When I lost a lot of weight and still wore from the beginning a lot of clothes. His friends and others noticed it.
Sometimes he stood next to someone and I noticed very late that he was very close so he said hi and I said hi to him too.
Also when I was playing around with two people, they started to run in the gym for fun to another room, he just stood there and looked at me. It was very empty then, so I knew he looked at me, so I made a weird face, like "okay wth he looks at me. That's weird" He just stood there and watched with a poker face so I ran to the other two people to get away from the weirdness. One of the two people also noticed he watched me.
Or when I heard someone would pass by and I was on my phone. Suddenly they said his name, I was with someone and that person said he just stared at me, like he wanted to talk but I kept looking at my phone.

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Updates
1 y
Even I came across him outside, I was on a bicycle and went somewhere with someone. We were laughing and then I saw him, while we had to make a turn, he looked at us, so I stopped smiling and looked away. I literally did everything to avoid him and to let him know I'm not interested in him like that or any other way. One day I even said when his friends listened to my conversation with someone who asked what my type was I said "I'm with someone right now but that kind of person isn't my type".
Updates
1 y
Just something to know, he is kinda type who is like I'm a bodybuilder I workout and thinks that everyone is interested in him just because he is popular... At least that's why I think he thinks that I care or whatever. Even when I live with more people and the ones who sometimes has window open and that person looks at houses, like most do in town, he immediately thinks it's to keep an eye on him when he walks by which is not the case, not interested in him tho.
What does his behaviour towards me mean?
1 Opinion