英语翻译1.She's not just another person I can talk with or wave

英语翻译
1.She's not just another person I can talk with or wave to as we pass one another on the street,but a good friend.
希望能再着重讲一下pass one another 的意思
2.She is someone who will listen and make me feel understood the next time I may feel sad or worried for no apparent reason.
3.This is no small matter for me.
4.Making friends is a lot like dating after a terrible breakup.
5.I said ,mostly to her back.这里的back是什么意思?是说几乎跟在他的背后还是说几乎紧接着她的话?
6.Don't you think for a person of my age
7.I waited in line for my turn at the counter and then I described the briefcase and asked if by any chance it had been turned in .
8.It had been on the floor in the back seat.
9.It just went through that opening over there.