It really depends on whether or not you feel that you still want to be in this marriage or not.  If you do and you work out your issues but you are both still committed to this relationship, then you can continue the process.  If you feel like this is a betrayal that you cannot live with and want to end the marriage, you will no longer be eligible for adjustment of status on the basis of marriage if the marriage is no longer viable or will have ended by the time of the interview or is just simply not bona fide and your spouse will not be attending the interview with you.