Question??????

So my S/O feels like I monitor him when he is not with me. So when he go out with his friends it's like he gets a attitude when I call. Sometimes I feel he is up to something because I feel men don't get mad when there ladies call. It's to the point that I don't even want to call him when he is out no matter what 😔. What do u think? What is your opinion on this. When I'm out with my gfs and that is once in a blue moon when he calls I'm happy to here from him like my baby thinking about me. I get the opposite like my phone the only one that's rings when I'm out why is that and when he says this. It hurts my feeling. What should I do?