Hylas

In Greek mythology, Hylas was the son of King Theiodamas of the Dryopians. When Heracles killed his father in battle, he spared Hylas, took him on as arms bearer, taught him the ways of a warrior, and in time the two fell in love. Heracles took Hylas with him on the Argo, making him one of the Argonauts. At Hera's behest, Hylas was kidnapped by a nymph at the spring of Pegae. Heracles was heartbroken. He along with Polyphemus, searched for a long time. The ship set sail without them. They never found Hylas because he had fallen in love with the nymphs and remained "to share their power and their love." (Gaius Valerius Flaccus, Argonautica)