It depends how the question is read:
If it is asking, What is "You're so (+ adjective)." in French, the answer is: "Tu es tellement (+ adjective)". In French slang, sometimes people will say: "Tu es vachement (+ adjective)."
If it is asking about the English colloquial phrase of "You're so in", meaning either "you are very much accepted in this social group" or "you have a strong chance of being sexually successful with this possible romantic partner" and several similar meanings, this expression does not have an exact equivalent in French. Most likely, you will just have to say what it is that you mean by "You're so in".
aurevoir (if youre saying bye) par(if youre saying by like if youre writing a story)
mais tu n'es pas prêt / pas prête
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.
'je vais me coucher, bonne nuit' (I'm going to bed, good night)
youre the only one for me
To say "I am so jealous!" in French, you could say Je suis assez jaloux!
Beautiful baby girl is "un beau bébé" or "une belle petite fille" in French.
There is no "won't" in french, so you say the opposite of I will. Je ne vais pas.
"Believe" in French is "croire."
It is a French noun, so it is the same, "turquoise".
Egality in french is "égalité" Not so different :)
You can directly ask the person about what happened. If not you could get another friend of yours to ask from them.