If you guys told each other everything, I think it is a good thing that you expressed yourself. It means you were honest enough in the relationship to tell your true heart thoughts without fear of reprisal. I'm sorry for the loss of your friend, but no need beating yourself up over it. We all say things we question later, but if you were honest and you two were close - thats honestly all someone can ask for. I think that perhaps your thoughts (in detail) could have simply given him a different perspective.