The day will require some mingling from you. Build the energy and the enthusiasm for this.
You can look at things this way—what scares you more, commitment or being alone?
You don’t have to prove yourself to everyone, just to yourself. When you believe completely in what you can do and what you can become, it will be seen by all.
Give up certain food that you already know first-hand have a bad effect on you. It might be hard at first, but it’ll do you good in the long run.