I don't know how to start this.

I don't know how to start this. I have this friend whom I treat as a best friend and I bet she probably does not know that. During school days, we were very close. I never thought that I would have a friend like her who knows when to make me laugh. You see, laughter is the key for us to become closer. There are many times that in our relationship (as close friends), I am the one who starts a misunderstanding between us and eventually this misunderstanding becomes a fight. I am insensitive, that's the problem before. I would often react impulsively without taking into account her feelings, and that makes her more sad and irritated. Once, there was this argument of ours that really made me cry a lot. I decided that I should not go with her anymore because the more I become close to her, the more pain I can cause her because of my unconscious insensitivity towards her feelings and emotions. But eventually, we became close again. I had a trauma because of that argument of ours before. I cannot say no to her anymore everytime she asks a favor to me. I can feel that she became dependent on me, and I cannot blame her because it was me who is always by her side during the times that she needed someone to talk her problems to. This summer, since there are no classes, we had very few meetings. I thought that because of this summer, she became less dependent on me. It's not that I don't want her to become my friend anymore. I just want her to become less dependent on the people around her.