The aim of this research was to clarify the nature of experiencing relationships in connection with the dark aspects of personality—Dark Triad. The study was conducted on a sample of 293 young adults (Mage = 22.9, SD = 3.4), 53.6% of females and 46.4% of males. The Slovak version of Short Dark Triad—SD3, the Slovak version of The Sternberg Triangular Love Scale (STLS) and the Slovak version of Experience in Close relationship—Revised were administered. The model of complex relationships of the Dark triad, components of love and attachment style explained 83% of the variation of the attachment style in a close relationship. The Dark triad had a direct negative effect on the love components and a direct positive effect on the attachment style in a close relationship. The components of love had a direct negative effect on the attachment style in a close relationship. In the model, gender differences were found.