1.A romantic relationship between two people in which one person does not always act like him/herself, and the other half tries to peacefully help him/her be him/herself no matter what other people do or say. One person in the relationship wants the other one to be their real self all the time, and not always conform to what others do/wear/etc.
2.One person in the relationship is struggling with his/her inner self but is trying to peacefully cope with these problems, since that could interfere with the relationship with the other person.
1. Dashboard Confessional sings the song "The Swiss Army Romance."
2. The lyrics of "The Swiss Army Romance" help to understand the definition.