I hacked my friends account?

i figured out her password, and I hacked her account. I've deleted some of her friends, and i have deleted some messages. but i haven't posted anything or chatted. and she's lied to me. But today i left her account on and when i went back on i thought it was on my facebook. and this guy said hi, and i asked him if he had a crush on her ( but i was on her account) and he asked me " aren't you (her)" and i said no, i'm *blabla*. and he was like WOW. and i checked my profile and it was on her account and i quickly said, haha joking i got you you thought i was __ haha. and he was like " hahaa you got me, i;m gunna ger u next time. anyway i have to go. cya xx <3" DOES HE KNOW I HACKED HER ACCOUNT????