I was arrested for domestic abuse, but the woman that filed dropped the charges. Will this block a fiancé visa for a woman from philipines ?

This should not cause a problem in sponsoring a fiancée. However, the arrest and the disposition of the offense must be revealed in your application. Please be sure to obtain a clerk certified or attested copy of the judgment dismissing your case. I would urge you to consult with and hire an immigration lawyer to assist you with this case. Not because I think you’re not capable of handling it, you may will be, but in order for the lawyer to debrief and brief you, analyze, assess and evaluate your case in order to maximize the possibilities for a successful result.