When you are up in life, your friends get to know who you are. When you are down in life, you get to know who your friends are. There will be many people who will be great to be around when times are easy. Instead take note of the people who remain in your life when times are hard.
The friends that are willing to sacrifice their time & the resources they have in their life to help improve yours. Those are your real friends. A real friend is one who walks in, when the rest of the world walks out.