I am never anybody's 'first'?

Dont want to sound like a depressed teenager, but the people who I always prioritise, always seem to prioritise other people. They tell me what a great friend I am blah blah blah in private, and how much more I mean to them than others, yet in public (Facebook etc.) they put on this big show of 'lawlz dis is ma bff' and how much they love another friend etc. But never me. I feel a bit wasted, and when I try to drift off they suddenly realise how important I am and want me back. To be honest sometimes I feel like I dont have real friends. I am NEVER anyone's first...maybe I should learn to be independant or whatever? I doubt there is such a friend that sticks with you their whole life, so whats the point?