I have a crush on a guy at my gym. We occasionally talk to each other. I noticed he gets a bit jealous when other guys are around me. Few months back i remember him intimidating guys at gym for looking at me. But i thought it maybe its my misunderstanding. Then 2 days ago, i was talking to a gym trainer. And he saw it and came and he was teasing me with facial expressions that the trainer is very strict, his expressions were joking but it seemed he didn’t like me talking to another guy and wanted me to not talk to him. Then today another trainer was standing close to me and he came walking and gave intense stare to the trainer and then he looked at me and walked away. The trainer realized he was trying to tell him to back off, so the trainer intentionally started to talk to me and looking at him. Then few mins later the trainer was standing near me and he came smiling and trainer also smiled and they were walking, talking and smiling far away from me but both their smiles seemed forced and after sometime the trainer was looking away from him and he kept on putting his face closer to the trainer. It was funny yet weird.
He talks to other girls. Several times he intentionally talk to girls standing in front of me and looks at me from side.
What do you think is going? Am i overthinking? What should I do?
**TL;DR; : I have a crush on a guy at the gym. He gets jealous when any guy talks to me. He talks to other girls in front of me and checks out my reaction. **