Love is a strong emotion of carrying about the well being of another.
Having said that every individual has their own "litmus test" of what love is suppose to look like, feel like, or be expressed in terms to convey it.
"If you loved me you would....etc" or "A real man/woman would...etc"
This is about our own (individual) definitions/expectations of love.
We look for those who love us way the way (we) want to be loved.
Most of us know how we feel about others but we question how they feel about us. This is especially true if they don't act/behave the way we want. Some people demand proof you love them before they will allow themselves to love you or admit they love you.