Guy pointing out my flaws to me?

What do you do when a guy tries to point out all your flaws to you?

I know at one point this guy was interested in me but I said I wasn't interested in him but he was the sweetest guy ever so we agreed to keep it friendly but after awhile this same guy started getting very rude to me for no reason. He started to pick out my flaws to me and even started accusing me of being a certain way that I know I'm not (he said I have trust issues when I never had them in my life - I actually have a problem with being too trusting with people while he on the other hand has them! - Oh the irony.) I ask him what's his problem and he says he says doesn't know what I'm talking about :|

How do I set this guy straight? He just started being a jerk all of a sudden I don't get it!
Guy pointing out my flaws to me?
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