Your friend has heard you complain, whine, b&tch, etc. about your H... Your friend wants you out of pain and is not invested in your M. So...who knows best here, YOU or your friend. You seem to take a lot of advice on legal matters from this friend,too. You WILL get child support..you Will get custody...you WON't lose everything if you don't D now....your friend, sorry to tell you this, but is off track....almost sounds like this person is trying to scare you into getting the D....
Talk to your attorney about legal matters and your H about R matters ...talk to your friend about friendship issues...and don't mix the whole mess up... If your friend wants to help you...he/she will support you in whatever it is that YOU really want... as long as H isn't abusing you or the kids....
I guess what I am saying is figure out what YOU want and then have the backbone to really go for it...or you won't get it.