So my partner met a woman at the gym. He told me one day that she had asked him to help her with some of the equipment, & that was no problem. Then I walk in to the gym some weeks later to find him with her again- just the 2 of them. He did introduce us & I was v friendly but her face hit the floor when She saw me & they swiftly left together as they had finished working out. I approached him about it & he was furious. He doesn’t understand at all why I’d be upset. Turns out they’ve been messaging each other to meet to work out. I don’t speak to any other men at the gym, whereas he has met lots of women there. This really concerns me as I wouldn’t even know how to strike up a conversation with a man at the gym without feeling like I was giving the wrong idea. I feel he being is over friendly towards other women & it makes me feel insecure. Would anyone else feel upset by this or am I just being overly insecure?