Being to friendly with my roommate !

So I live with my roommate whose also become a friend over the last 6 months. I’m nowhere near jealous . Recently I’m starting to feel like their being too friendly. The other day they started having a pillow fight thought nothing of it. Than the other night I was laying on him and she came home from work. He almost dropped me off the cough to hide behind the door to smack her with a pillo. Ok no biggie. This morning she came in the kitchen and they started play slapping each other. Is it me or is it off. Is it worth mentioning?