I have to vent.

When I'm really pissed off about a friend or anything else. I put it on Facebook. I say things in my status. It's something not nice. I hear my stupid coworkers talking about it the next day. Saying I shouldn't say things like that on Facebook. I thought this coworker was my friend. Not cause she tell my supervisor what I say and did. To score brownie points. I need to delete or have separate accounts from co workers and friends. If I delete they will ask why I delete them. I have a client he found me on Fb he sent me a request. I don't know what to do? Do I add him or just ignore it. If I do ignore it will he approach me?