I think it's good to acknowledge your past loves or those whom you have loved in the past by rembering the love that was there at that particular place and time. Once loved, always loved in my book.
Love is the thing that unites us and makes us one, to love a thing once is enough to put that thing on our radar and begin the process of attraction. Thats the law of attraction at work within ones life.
The question is are YOU thinking of a person more than usual because a single positive thought is enough to initiate the law of attraction and begin drawing that person into your personal experience.
Life is measured by how much one loves. The more love one has, the more abundant life is. Amen