Perhaps we should assume that U is a person (like U Thant, the United Nations Secretary-General in the 60s) who loves CoH, and the OP wants him to say go hero, go hero, go! So we should interpret it thusly.
"If U love [sic] City of Heroes, let me. Here, U, say go hero, go hero, go!"
Why a Burmese guy who died in 1974 would love City of Heroes is beyond me, but it's about as probable as any other interpretation.