In a relationship you start out at zero. What you put into the relationship is what you probably will get out of it. If you put nothing in or get nothing in return it is like investing in a bank that has gone bankrupt. That kind of relationship is a loser.
The quality of the relationship is based on the same principle. The better you are to your partner, the happier he/she will be and that means he/she will more likely be warm and thoughtful to you. Usually you get what you give. If that doesn’t happen there is something wrong with that relationship.