Am I tripping?

I just got into a new relationship with a person I was really good friends with. I've always known that him and his cousin were close but lately I'm starting to get annoyed with how obsessive they are with each other. Whenever he calls he picks up immediately no matter what situation we're in whether it's a date or even SEX. And it's never like his dousing is calling for anything serious. Just wanting to go the club or one or their guy friends house. When we're otp he's constantly putting me on hold to talk to his cousin and usually it's to make plans to go to the club things they did together when he was single. Am I tripping to feel like the whole thing is getting outta hand?