You need to buy your logic a helmet and some boxing gloves. Then you can show that voice who's boss!!

Have you ever wrote a list of things that prove to you that you're not a failure or an embarassment? If you haven't... write one at some point when you're feeling good, and then you can go and look at it whenever you need to. Keep it with you when you're out somewhere in case you need a reminder! If you have people that you trust and care about, you could always get them to help you make the list.