Compound there are two sentences connected by a semicolon, you can tell because they each have their own subject (the musician, she) and their own verb (preform, had).
Dear Rose,
When I look at a beautiful rose like you, I love your rosy scent and the way how you look. When I see you, it reminds me of someone who I love and care about in my heart. A rose like you, brings me happiness and smiles to my face.
