Has happened sooo many times with me, with both friends and potential partners. I think some people take an initial interest then realize not long later that they weren't as compatible as they thought. Or they used you. Maybe you did or said something that turned them off. Some people (like air signs. Gemini, Libra, Aquarius) are naturally fickle. They flit from flower to flower. They move fast, seem super interested. Then fade away just as quick as they came