I've posted again cause maybe it fits better here

I just found out my SO has a female roommate. I had no idea, and I know I should trust him and stuff but he's a super insanely sexual person and I'm scared will do stuff. I feel bad for not trusting him but I have my reasons not too, help?

Also he picked roommates while we were together, so it's not like he had no idea or it was before us.