Thank you good friend in French would be Merci, mon bon ami.
You can say "Au revoir, mon ami" or you can say "Au revoir _______" The blank is the name of your friend.
Informally, "Good morning to you!" would be "Bonjour à toi!" in French.
Bonne chance, ami.
Vous êtes mon bon ami
ami / amie is friend in French
Bon voyage, mon ami(e)
That last answer is the formal way to say 'friend'. male friend - un ami female friend - une amie OR to say "The Friend" you can say- l'ami
"Will you be my friend?" in French is Serais-tu mon ami?.
Vous avez..... ? (for a stranger or someone older than you) or Tu as..... ? (for a good friend)
je suis bon / bonne mon ami(e)
au revoir mon ami (or amie if its a girl