Singer tells sweetheart who spurned him/her that s/he "would not serve you as you served me." Singer plans to mourn and weep, and tells sweetheart to grieve over his/her tombstone. (Singer vows to "court the girl, the old lady ain't in")
Sharp's "A" version doesn't define the sex of the singer or sweetheart. The "B" version is a fragment, which doesn't really overlap the "A" version; Sharp may have been using this as a catchall. - PJS