I am going through the same thing i have two best friends. We met 13 years back in kinder Garden. This person lets call her Ann. I tell her everything and she listens. She helped me through my depressed period and she means a lot to me. But recently ateast for 2 years maybe i feel like i am a burden on her and she keeps forgetting about me. She has a really big family and i know its hard to keep up but still. She is not very expressive but even a few months back she explained how her whole family knows me and this other person as her close ones but i cant also ignore the times i felt left out because of her..