To dream of love when love is absent in your waking life can represent your desire to be accepted and your feeling of loss that you do not have the love that you see others have.
If you dream of love with a person that you are in love with in your waking life this can just be a reflection of the intensity of your feelings for that person or the situation that you in together.
To dream about loving a friend or another person in your life that is potentially not acceptable or acknowledged shows there are feelings you are trying to repress that can come bubbling up to the surface of your conscience.
It can be your mind mulling over a preoccupation with someone and wondering whether they feel the same way. Alternatively dreaming of a love for someone in your life can imply that you really admire a certain aspect of their personality and are trying to incorporate it into your own personality.
For making love, see Sex.