Hey there @Dleehy2002,
It's fantastic that you had such a wonderful time at camp! Were there any strategies or things you did that helped you before you went and while you were there? Dealing with anxiety is hard, especially when you're able to do something like camp but not anything else. It's hard to know the reason behind why we get anxious, but there are things that we can try and do to help ease those feelings. For me, I find playing with something in my hands, such as a pen, calming. This thread over here has a great list of coping strategies and distractions that might have some ideas for when you're feeling sad or bored or to help with feeling anxious.
There's also this article over here on motivation with ideas on helping you get motivated and stay motivated. Things like setting goals, using rewards, to-do lists and such. Finding motivation and setting goals can be one way of pushing past the feelings of boredom and not wanting to do anything, especially if it's doing an activity you enjoy. What do you think?