So a couple of months ago I was pretty close with a friend of mine and among other things we have talked about our jobs. I have told him that I'm not (very) happy at mine and that there are things that I like about it - i.e. the atmosphere is good, it is a fun place to be, but there are things that I don't like - i.e. the salaries are lower than those offered at other companies and I have also shared with him that I am contemplating quitting and have interviewed with other companies.
At some point we drifted apart (no bad feelings, just started seeing each other much less often) and when we recently met he told me that he will be starting work at my company soon (the same I have badmouthed some time ago in front of him).
I hope that I'm overthinking it, but I feel a bit nervous and negative about us working together. I feel awkward that he knows so much about how I feel about my job - I have discussed the things that I dislike about the company with my boss (i.e. salary) - but I doubt that he knows about my interviews at other companies and so on. I'm afraid that we may even end up working at the same team (hopefully not).
Is there something I should be worried about (even in worst case scenario)? How should I act?