Okay, I'll make this simple.

You're a fraud because the only basis for your arguement is that I don't have any experience with girlfriends, when you are completely wrong.

That is why you are a fraud. I could list more, but I figure it's best to not overload your systems here.

Maybe my use of fraud is a slang term around here, but the concept is that you're making a fraud out of yourself by being a dumbshit.