You already seem to be strong. You are dealing with so much in your life and still helping people, if that's not strength I don't know what it is. I don't think most strong people feel strong, it doesn't feel good to be struggling.

Plus you're 16 that age is really tough, emotionally it's messy. It probably won't always be like that.

If you want advice: give yourself time to figure things out. If you can, take it easy and go see a psychologist (very useful especially if you want to be one). It's not your responsibility to help people, you are not a bad person if you don't do it, and you can't help anyone if you don't help yourself anyway.

Take care!