"Tres de sus amigos."
tres
There really isn't a Spanish word for "besties", but you can say "Mejores amigas" (Best girl friends) or "Mejores amigos" (Best guy friends or best guy/girl friends).
Tres mas dos
I guess you mean "We are just friends". You can say: -"Somos solo amigos" ,or : -"Tan solo somos amigos"
novecientos veintitres
It would be helpful to have more context with this, but literally this would be "ser amigos juntos".
To write 1753 in Spanish, you would say "mil setecientos cincuenta y tres." This breaks down to "mil" (thousand), "setecientos" (seven hundred), "cincuenta" (fifty), and "tres" (three).
You can write "I do not speak Spanish" as "No hablo español" in Spanish.
the way to write "i" in spanish is "yo"I= yo
tu amigos mean '' your friends " in Spanish !
How to write "our hearts are broken" in Spanish.
In Spanish, you write '725' - 'setecientos veinticinco'.