I wish I could say magic words to make everything better :(

But, it's so good that you were able to spend time with your uncle when you were younger, and that you had a close relationship. Family shapes so much of who we are and who we become. If you're any measure, your uncle was a really great person. We can never say 'I love you' enough, but...that's life. I'm sure your uncle knew you loved him, and as long as he knew, that's the important thing.