YOU SAID:

(ahhhh) Im at school and after i cant wait to go to a friends house

INTO JAPANESE

（ahhhh）学校にいるとき、友達の家に行くのが待ちきれない

BACK INTO ENGLISH

(Ahhhh) When I'm at school, I can't wait to go to my friend's house

INTO JAPANESE

（ああ）学校にいるとき、友達の家に行くのが待ち遠しい

BACK INTO ENGLISH

(Oh) I can't wait to go to my friend's house when I'm at school

INTO JAPANESE

（ああ）学校にいるとき、友達の家に行くのが待ちきれません

BACK INTO ENGLISH

(Oh) I can't wait to go to my friend's house when I'm at school