You can be there for him by visiting and helping out some, but it sounds like he needs a nurse to come in and take care of him. You have a life to live and you shouldn't have to help him 5-6 times a night and who knows how much during the day, that is what a professional care giver is for. Sure he might try to manipulate you into feeling guilty for backing up some, but a job like that requires more than just you trying to do it all yourself. Do you have other family members who can take shifts with you to help him, at least?