The source of all love
The Chassidim teach that physical love is a branch of spiritual love. It is a materialistic expression of what the soul truly yearns for. G-d gave us these desires only to "learn" what the love of G-d should be like. As David Hamelech said, "Tzama lecha nafshi, Kama lecha besari" - "my soul thirsts for you, my flesh aches for you."
If someone has a very strong subconscious need for love, it means he has a great soul because he has the highest opportunity for the true love of G-d. But he is in this world to learn how to focus it properly, to channel the love in the right place - to the Source of all love, all beauty, all desire, and all good.