The couplet means that the speaker wonders how long he must roam, and wishes that his beloved would arrive and sit like a maiden of the desert winds.

This poignant couplet is an intimate invitation. The speaker asks the beloved, 'How long will you keep wandering?' He expresses a deep longing, wishing that the beloved would cease their journey and simply sit beside the beauty of the desolate wilderness. It captures that beautiful tension between wanderlust and the comfort of a specific, desired presence. It's a plea for connection, a desire to halt time and share a moment of quiet intimacy.