Ever feel you invested too much in a friendship; no one else to blame?

i told myself that they were not a true friend. friendship is something that goes both ways. so if she or he wasn't responding than you have to ask yourself. "were they ever a good friend, were they ever there when i needed them?, did they know how i was felling just by looking at me?"if the answer is no than get over this person because they were never your friend in the first place