At the end of a job interview, as I was leaving I said I hope to hear from you, and the interviewer said yes you will ..does this mean I did well or was she just being polite?

I think the interview went well. Well the interviewer was quite informal and relaxed . it was a mix of professional and personal conversation. I asked alot of questions about the job.. I just felt like it went well.
Then at the end we were both quite smiley and I said nice to meet you and I hope to hear from you and she smiled and said of course you will..?

What do you think?