vous devenez vieux, vous commencez à vieillir
aurevoir (if youre saying bye) par(if youre saying by like if youre writing a story)
to get too old is devenir trop vieux (masc.) / trop vieille (fem.) in French. See link to conjugation of 'devenir'.
mais tu n'es pas prêt / pas prête
You can say "Je vais mieux" in French to mean "I am getting better."
"je deviens vieux maintenant"
To say "You're dumb" in French, you can say "Tu es bête" or "Tu es idiot." However, it's important to use such words with caution and respect for others.
How to say " I am young not old," in French. "Je suis jeune pas vieux."
This is how u say thank you for getting back in french:''Je vous remercie pour se remettre''.
'je vais me coucher, bonne nuit' (I'm going to bed, good night)
Cinquante ans is how you say fifty years old
how old are they is translated "quel âge ont-ils" in French.
If your question is, "why would a girl say youre not old looking?", then they probably think you are cite like a little kid. I have that exact problem. Goodluck.