Continue working on yourself. And think of your talk with Cheryl as something you are doing for yourself - to give you more support in becoming the best Brit you can be. You can go to the BBQ afterwards. You might feel better after the talk anyway and have an even better time than you thought you could.
^^I agree. Think of Cheryl time as an investment in yourself. It's helpful to talk to a pro to help you remember that you're not crazy! (totally )