I divorced from Farcebook about three weeks ago. Too much information being thrust in my face from 'friends' and their friends who seem to be unable to express themselves in simple words with resorting to absolute profanity I had never seen in previous verbal communications with them. I managed to "block" the worst offenders, but in the end a clean break was the most elegant solution.
I had been in the system for about three years. I don't need it, and I haven't missed it.
If you really can't live without it, then, as recommended above, a change of password is a top priority. Alternatively, close your account, and after the obligatory 'stay away' period of 14 days, rejoin under a modified or different identity, advise the friends you really want to keep in the loop, and continue the adventure - perhaps with an increased diligence in respect of how much you really need/have to share.
F_O_R