Why should one not love anyone else other than God?
 
There are in all four types of relationships in which soul is involved.
1. Soul to another material Soul
2. Soul to inanimate substances
3. Soul to God
4. Soul to another divine Soul
 
First one is very common. The relationship can be through hatred or through love. Love is word that represents liking for another individual and it could be result of many relationships that represent love. For example, parent-offspring, Friend-Friend, Brother-Sister, Husband-Wife, Beloved-Darling and many other. Out of these, it is the Romantic Relationship in which love reaches to its highest level.