While understandable, it is best you initiate it and you are in control. You do not have to talk to spouse directly. Best if lawyer does all the communication.
Remember, since you are married, you may be liable fo any new debts (loans, credit cards) your spouse gets approved for. You also may be accumulating more assets etc which in many states will have to be split between you and spouse when divorcing. Plus staying married when relationship is over can be perceived by USCIS as immigration fraud or attempt to hide the real state of marriage.
Yes, quick separation and divorce can affect your naturalization. But you can't pretend everything is OK as it would be fraud.