How do you deal with the silence and not talking much?

This is a horrible situation. What happens if YOU die? Will grandma then pay for help? God bless you. She is selfish and controlling. This is not normal. Your aunt who has POA needs to step up and DO HER JOB.. not you. Call her and speak up ! Tell her you are LEAVING !!! Stand up for yourself ! You deserve better

Please consider that your grandmother may need more services than you can provide alone. Reach out to your grandmother's doctor for assistance. He/She can help you find social services for your location. You may need to reach out to the rest of the family and ASK for help. Let each family member know the types of help you need for your grandmother so you can actually go to work again.

God bless!

You are soooo young and deserve to have a life. The aunt should have sat down with you and made a plan for grandma's care. More than likely grandma needs to be in a facility where she can get help with personal care and be watched 24/7.

You are a young man who needs to be working and planning your future. The caregiving/decision making should fall on grandma's four children.
I am sure your grandma is very thankful that you have paused your life to help her, but she would not want to keep your life on hold. I promise you she wouldn't want that.

Call a meeting with grandma's four children. One of which is your parent and should be doing something! Tell them you need to go back to work and will be moving out as soon as you find a job and that they need to come up with a plan for their mother.