I am so so so sorry to hear about your lose. How you loved Maxie and how he loved you. We lost our Cassiegirl five years ago and the pain you are feeling is so familiar to me. I cried everyday for a month I missed her so. For us adopting a kitten, Jake a Poo helped us heal. His silly antics and innocence was what stopped my tears along with my daughters.
Good luck to you. I realized after a bit that the greatest gift we can give to our loved furry children is exactly what most of us do, give them the best life possible and to not let them suffer. You did that. You were a great mom and Maxie knew that.