Emotional affairs can be just as destructive to a relationship as physical cheating, and even murkier, making them difficult to resolve. Often they’re harder to pinpoint and define than a sexual affair. “It starts out as a friendship, so it can be confusing.” “The important thing is to determine where a friendship crosses the line. It is a slippery slope from friend to emotional affair to a sexual relationship.” While the person involved may not feel sexual chemistry, he or she might still feel an intense sense of intimacy deep enough to make his or her partner feel it’s a form of infidelity. The lack of defining acts or words makes this situation even more ambiguous. However, there are some clear signs that something’s amiss — and that your partner is forming an emotional bond with someone other than you. Here’s what to watch for.