Question

can I use any of them while ending an informal letter
Adios, (whether or not you speak Spanish, a warm way to end the letter)
Always and forever,
Best regards, (this works for both formal and informal writing)
Best wishes,
Ciao,
Emoticons (smiley faces, :-), etc.,
High five,
Hugs,
Kindest regards,​

Answer 1

mostly words

sincerely,lovingly,kindly etc words are used.

if u are writting for school then u can use:

best regards,

best wishes,

kindest regards,

always and forever,

and;

the left are friendly.

hope u understood, and it helps.

thanks.

and good nyt.