You know the one--the kinds of people who root you on. Positive people help, maybe even people who aren't intimately connected to you (family for example). Being around an environment that's positive, helps both in pointing to a better picture in your mind (the possibility of), and it also adds the critical dimension of community.
Although you may not have it in you to maintain a friendship as often as you would like (but if you can, opt for community), in the least, make a point to chase those who root you on. And if you think you're not worth it, remember that's a lie.