Love never leaves us.
Sometimes, we just forget or refuse to accept its presence, either because we don't believe in it anymore or we are aching for the past or something along those lines.
But love is not necessarily constant. It can change shape. A lover can become a friend, or a friend a lover, or friends can fill in the gap a lover leaves-- love changes faces and contexts and action and merit, but it is still there.
You have been loved, and you are loved, and you will be loved.
Let it happen.