"The Blind Side"

In friendship, I always thought there are two kinds of friends. One, is the kind of friend who will not ditch you because the bf/gf suddenly calls or needed you to do something with them. Two, is the kind of friend who will ditch you no matter what. *Ditch*-in the aspect of not returning calls, no texting back, not caring, not giving a damn if you fall flat on your face. Sad but true. And just lately, I happen to see that there is actually no two kinds of it, but just one. We are all the same, there is something inside us that is gonna be like that. Just depends with how people tends to show it. Cause I had seen people ditching friends just for someone, thinking that friends would understand, let me emphasize it again - thinking that friends would ALWAYS UNDERSTAND. But still, I don't literally mean only in friendships. Cause I know this happens on families too. Parents and between siblings, work. So there should be no surprised when these things happen occasionally. Would you agree or not?