I've been used in a few friendationships (You're led to think it's the start of a relationship, oh, okay, a friendship, huh, did I even know you???)
You believe the person, then you get the little lies like "I'll call you later" and they never do. After the whole thing has tanked, you start wondering about every thing the person said/did (darn aspie brain that remembers EVERYTHING.) Analyzing things, you realize you were being played with and getting used, which usually makes me wonder things like "How could I be so naive?" "I should have saw this coming"
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...still plays with trucks