1) Yes, I trust my friend
Because I am sure, that he/she will never leave me alone
2) Yes, it's *сокращенное имя друга* Because his/her nickname is easier to spell
3) He/she is good at drawing
He/she is bad at chemistry
4) He/she can draw really beautiful pictures in such a short time
5) Yes, he/she does
6) Kind, tolerate, funny