spoony

\SPOO-nee\, adjective:
1. Foolish; silly; excessively sentimental.

--Shoebox Cards used to be the edgiest greeting cards in town, but lately they’ve gone all spoony!

2. Foolishly or sentimentally in love.

--Well, Mrs. Johnson, your son has, as we in the medical profession like to call it, gone spoony.