Love - it's just something that is unconditional love. If in exchange for your feelings you want to get something from another person, then it is trade, not love. Just as in the store, you give something to get something in return. This trade and market relations, and we can not call them love. Only an informed person can love truly. Everything else - love on the verge of trading. For example, we are greeted by someone he did not answer us the same, the next day we would not shake hands with him. Therefore, love can only give, not to take from someone.