Jenny,
I am so very sorry about your brother Paul. He sounds like he was a great brother and son despite addiction.
I lost my brother John under very very similar circumstances too almost 3 years ago. He was 42. The worst part of it all was watching my parents go thru it. I miss my brother very much but I hold on to the thought that he isn't struggling with addiction any longer. He is free. And I truly believe that he was welcomed into the arms of our heavenly Father because he, like your brother, was a good and loving person who just lost his way.
I also gave a eulogy at my brother's funeral. I talked alot about childhood memories that I had of him. We were always so close growing up.
Your eulogy sounds really wonderful. Its from the heart...and thats all that matters.
I'm sorry for your loss. I'm sending prayers and strength your way today.