Answer:
Love,subconsciously, is indeed a motive behind most actions of most people.
The need to receive love is as strong and pervasive as any other.
However,when it becomes a motive,it no longer is love.For love means to give unconditionally and nothing else,without any desire of any reciprocation.
If it is conditional,it is diluted.And diluted love is an oxymoron.
If it is a motive,it is not love.It is something else.
Therefore,love,in its purest form, cannot be a motive.