So my boyfriend’s best friend is a female he’s known for 6 or so years. He is also close with her husband but she and him seem to be closer. Their kids even call him uncle.

I, however am struggling with their friendship. I know my boyfriend cares about me and he shows me love & affection. I know part of it is anxiety from past relationships. They still plan overnight camping trips with friends and whatnot. How do I handle this situation?