shuv nihyeh chaverim (שוב ×?×”×™×” חברי×)
(unless both of you are girls, then it is shuv nihyeh chaverot)
Chag sameach, chaverim!
our (male) friend = חבר ×©×œ× ×• (khaver shelanu) our (female) friend = חברה ×©×œ× ×• (khaverah shelanu)
to smile again = lekhayekh od pa'am = לחייך עוד פעם
say ignore them if they do it again
male close friend = khah-VEHR TOV (חבר טוב) female close friend = khah-veh-RAH toh-VAH (חברה טובה)
well, if she really wants to be your friend again shes just gonna come out and say it.
say I just became that way that I didn't want to ruin our friendship
a male romantic friend = khaver romanti (חבר ×¨×•×ž× ×˜×™) a female romantic friend = khaverah romantit (חברה ×¨×•×ž× ×˜×™×ª)
Chaverah (חברה) or yedidah (ידידה)
I think you should just say I am not going to be your friend.
Apologise to your friend for whatever you did and say you want to be friends again.
Friend: חבר