Jealousy?

Hey guys this sounds super weird pls tell me if I’m being crazy. So my bf and I have been together for 3 years and have friends w girls and guys both. However none of us has actually hung out one on one with the opposite gender ever. Today he’s hanging w a friend (not his type but doesn’t matter) who is a girl and she just moved to our city. They’ve been doing hmwk outside for a few hours. Is it weird tht I feel weird abt it? I absolutely trust him and ik this is nothing but for me it’s weird just simply bc we have never done anything like this b4. Am I simply reading too into this? Or would you ladies feel a little jealous as well?