lovesick

love +‎ sick

lovesick (comparative more lovesick, superlative most lovesick)

1. Behaving oddly, or as though in distress, due to being overcome by feelings of love.
   • 1834 [1799], Samuel Taylor Coleridge, Robert Southey, “The Devil's Thoughts”, in The Poetical Works of S. T. Coleridge, volume II, London: W. Pickering, page 86:

     And she looked to Mr. –––– / And leered like a love-sick pigeon.

   • 1997, Bob Dylan (lyrics and music), “Love Sick”, in Time Out of Mind:

     I'm sick of love / I hear the clock tick / This kind of love / I'm lovesick

2. Having an aching desire for one's beloved.

• limerence