I live by myself in a manor. I've lived alone for many years and I'm self sufficient. I take very good care of myself and I take my meds on time. They worry about me because they live out-of-state, but that's not my problem. I would like to know what are my rights? Can they do this to me?
But I am curious why your son and your brother would suggest that you move to assisted living. Maybe they are noticing something that you are not noticing.
If they meddle in your affairs and pressure you to leave, you can always call APS and ask them to intervene on behalf of a vulnerable elder.
If you read the posts on this site, you will easily see the frustration of caregivers with the refusal of loved ones to move into more appropriate housing.
Having said that, may I go ON to say how fortunate you are to have both a son and a brother who are concerned for your welfare. Too many people have no one.
My advice to you would be to welcome their concern and thank them sincerely for it. If there are some few things you can do to set their minds at ease? Well, I'd probably try to please them with at least a few.