Why are you being so passive about this, like you can't take any action until he asks you to move in together? Take charge of your own life. You know you'll want your mom to be in assisted living someday, so start researching that now. You don't need to commit to anything, but it would be helpful to have a basic understanding of how those places operate, the costs, funding/assistance your mother is eligible for, etc. Some of those places have years-long waiting lists, so at least start researching now. Share your thoughts and feelings with your BF about important life stuff if you think it's relevant, without waiting for him to ask specific questions. Don't be a passenger in your own life.