"It seems like most relationships are based on who you are and what you do at the moment. They're based on events or common interest. You can be a good friend with someone for a couple of years. Then you realized both of you have changed, and it's done.
What I want is people who I can grow with. People who motivate and inspire me. People who support me through the growing pains. People who know me well enough to point out my bullshit and pursue my heart, even when I'm trying to be a hermit.
There are very few of those people around. Very few people with the understanding, stamina, and the ambition."
-From a very dear friend of mine (I have smart friends ;P)
I'm not saying lose faith in people - nothing like that. But maybe be careful who you choose to lean on. If you can look into someone's life (their behavior, stability, etc) and see that it is not consistent, you can still love on them and be friends, but maybe that's not a person you want to really count on to be steadfast for you.