Though In forlorn hope she knows the lovesickness will never be cured,

未妨惆悵是清狂”

its no harm for her in embracing blind passion with agonies ever unended.

FYI, Please refer to a similar writing of mine, "胡適新詩一首, and my translation", which was posted at  https://blog.udn.com/kkuo0810/7132961.

P.S.  Well, my renderings are also made in an indescribable mood of "無題".