Why is emotional infidelity harder to cope with?

Because it is the heart. Love is emotional, not physical. If one person it not committed emotionally and physically completely, the other person will seek this emotional security with something or someone else. Fidelity means loving that person more than your parents, job, career and you are willing to go anywhere with them. Fidelity is not controlling, nor does it play mind games, nor does it gossip. Fidelity is trust and open communication. Fidelity is total love and commitment and friendship and respect for each other. The two become one heart.