Issues of Cross-Sex Friendships Friendship is defined as a voluntary and cooperative personal relationship that may involve various degrees of companionship, mutual assistance, affection, and even intimacy. Cross-sex friendships are such non-romantic relationships occurring between the representatives of the opposite sex. Since cross-sex friendships are a historically new phenomenon, it is essential to understand how the mating strategies of men and women influence relationship experiences, both positively and negatively (Karandashev, 2015). The majority of studies focused on explaining the existence of attraction in cross-sex relationships, with theorists paying the most attention to the social underpinnings of attraction in relationships. Due to the gap in the literature, this research aims to examine the events that may either increase or decrease the closeness of individuals involved in cross-sex friendships during the first year of the relationship. Issues Bleske-Rechek et al. (2012) proposed that the evolving mating approaches of men and women impinge on their friendship experiences. The researchers conducted two different studies that offered specific conclusions. As a result of the first study, it was revealed that men had a greater physical-sexual attraction in cross-sex friendships compared to women, and they had the tendency to overestimate the attraction of their friends to them. The second study showed that experiences in cross-sex friendships corresponded to age differences in the likelihood of being actively involved in the search for a mate. Therefore, the mating strategies of the representatives of the opposite sex may shape their involvement in cross-sex friendships, beginning to unintentionally color feelings towards one another despite the initial platonic intent. In friendships, the attraction among cross-sex friends was found to be widespread and perceived more as a limitation rather than an advantage. Gilchrist-Petty and Bennett (2019) studied cross-sex best friendships in both the experience and expression of jealous feelings within intimate relationships. Through a survey, it was revealed that for engaged individuals who would soon be married, compared to their single, dating, and married counterparts, cross-sex relationships led to the most negative attitudes. Furthermore, the results showed that the experiences of preventive jealously were predictors of rival-centered jealousy expression, while the relative jealousy experience predicting expressions of jealousy, both constructive and destructive. Importantly, the research findings revealed that the opinions about cross-sex friendships can help in mediating relationships between the way in which jealousy is experienced and expressed. Turner (2016) suggested that heterosexual cross-sex friendships were non-familiar and non-normative relationships between men and women. Emerging adults that find themselves in such relationships usually deal with the need for navigating identity formation and establishing their own meaning of life, including personal spiritual beliefs. The uniqueness of the study is its focus on spirituality as related to its development within cross-sex friendships. The researcher explored t