[love is like] Someone is camping in your head

Romantic love is an addiction.

The brain system for romantic love is associated with intense energy, focused energy, obsessive things - a host of characteristics that you can feel not just toward a mating sweetheart, ... there's every reason to think that girls can fall in love with other girls without feeling sexual towards them, without the intention to marry them.

It is very much like a drug high. When you're madly in love, you think this person is more special than anyone else on Earth. You focus all your attention on them. You have personality changes. You're willing to take great risks to win the person's affection. And you have a tolerance level -- you see the person a couple of times a week at first, and that's OK for a while, and then you've got to see them every night.

Romantic love is deeply embedded in the architecture and chemistry of the human brain, ... Why We Love.

Romantic love is one of the most powerful of all human experiences. It is definitely more powerful than the sex drive.