Relationships are either delicate or strong, depending upon the bonding you share with your partner. The bonding depends on various factors. Some of the most essential ones being emotional attachment, friendliness, sense of ease, mental compatibility and a feeling of sustained emotional support from the relationship. This is applicable to all relationships; be it a relationship with your spouse, a parental relation with your children, a relationship with your friends, relatives, etc.
However, it is a common factor that every relationship requires a definite level of friendship, understanding and trust to sustain. However, sometimes you may find eventual signs of distance or detachment, which could be signals of potential violence in the relationship.