Carlos,
I'm sorry you're having to go through this difficult time.
People have said that caring for a loved one who suffers with dementia is like an ongoing bereavement without the opportunity to grieve properly. It's so hard to be the "strong one" all the time, but the strength you will need will only be available if you stay as mentally, emotionally, spiritually and physically healthy as possible.
The choices you make now will be choices you'll look back on in the future.
Please keep checking in, we're here for you.