i feel like you're still strong if you can pretend to be strong to keep your parents and others from worrying/think things are not okay.
it's strength when you can just push yourself to continue when you don't want to anymore
it's strength to just be there with your family when the times are rough, to try your best to help

i may not have known you for your entire life but the rosie i know is kind, has a beautiful personality and is a great friend.
you're going through such a rough patch right now but when it clears, you're gonna come out even stronger
your entire family will i think because this is just another obstacle in your life that you're gonna soar over!