Duru, my friend, you haven't changed at all. You're still handsome."
P.S.:
1) Lily, let me make something clear here. "o senin güzelliğin" can be said as a reply to "It's very nice/kind of you". So if there is a better reply than "it's the kindness of "you" (not mine)", please replace it with the one I offered.
2) here "Duru" may not be a name. If so, it can be translated as "My pure friend, you haven't changed at all...".
I think it would be better to notify this in the remarks field.