The Collaborative International Dictionary of English v.0.48:

Amorist \Am"o*rist\, n. [L. armor love. See Amorous.]
   A lover; a gallant. [R.] --Milton.
   [1913 Webster]

         It was the custom for an amorist to impress the name of
         his mistress in the dust, or upon the damp earth, with
         letters fixed upon his shoe.             --Southey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

amorist
    n 1: one dedicated to love and lovemaking especially one who
         writes about love