Block him on FB and also from SMS. Set up an email account just for communicating with him that can be vetted by a trusted third party (a sister or your best friend) so they only tell you about the parts you NEED to respond to and leave out all of the 'hoovering' crap.
Read about Hoovering here: http://www.survivinginfidelity.com/forums.asp?tid=480828
Limbo is the worst. It is absolutely crazy-making. You can stay in the crazy dance or you can just stop.
Unfortunately it will never stop if you wait for him to stop - you have to be the one to do it. They will cake eat and rugsweep and gaslight us for exactly as long as we allow it.
It stops when you say it stops. Eventually you realise any contact (including snooping or letting people tell you stuff about him) brings more new hurts so you end up going NC to stop going through that hell all the time.
NC = No New Hurts. It sounds to me like you've had more than enough new hurts.
Keep reading, keep posting. We've all been where you are now. Life is so much better since I got control of myself and implemented strict NC.