Through out the period of your loved one sickness you are going to have to deal with a lot of emotions, theirs and yours.
I dealt with dealing with the caregivers emotion in an earlier post.
Dealing With Your Emotions
Alzheimer's Disease patients are most of the time frustrated.
This is because their days seems cloudy, trying to remember, or worrying, or looking for something. Its a great burden for them.
When things begin to escalate and they begin to say hurtful things to you or do things to hurt you , don't try to lash back at them and don't take it personally, its not you failing to do your job.
These are signals that the disease is advancing.
Its tough having to deal with the negatives but you need to be understanding and remember why all this is happening and separate the incident from your feelings for your loved one.
Don't let these incidents hinder your relationship with your loved one.
It's not easy but it can be done.