Your friend really did manipulate you. You did not make a mountain out of a mole hill and you have nothing to feel bad or stupid about. You reacted the way any good and caring friend would. It sounds like his behavior has triggered your own symptoms, triggered you into feeling depressed and bad. I'm sorry you experienced that with him and I'm sorry you're having a hard time now. I hope you feel better soon and please don't beat yourself up about any of it, at all!