Do you think it is okay if I look for my wallet at the park by myself?
It is fine, be careful though please. We don't want anything to happen to you.
I thought I had my wallet in the park. I might find it there if I look hard enough.
If you have a safe place for your wallet it should be easily found next time. Try to keep it in your pocket the whole time you are out unless you need to pay someone.
It's not my fault, it's just good to keep things in one place.
Yes, you should and I am glad that you've learned this lesson. I really hope that you find your wallet soon.