When you feel the oxytocin, dopamine, testosterone or whichever chemical reactor is making you feel pathologically, possessively or obsessively attached to someone who doesn't seem to be giving you back quite as much, it means it's time to relax. Be a friend. Allow the relationship to unfold in its own time.
Do you even want what you think you want? Take a deep breath, focus on yourself, take a walk, go for a jog, take a yoga class and remind yourself there are other forces at work here. What you crave and desire, you will only push away by clinging too hard. People want to feel appreciated, and genuinely liked before they will respond in jest.
I think this whole concept that there are hormones responsible for our attachments is fine, but I like to remind people we are also in control of how we respond to emotions and feelings within our bodies. While you may feel compelled to hound the object of our affections down as a result of chemicals in your brain, you have to stop and think: "Is this really what I want?"
Moushumi Ghose is a sex and relationship therapist and expert, based in Los Angeles. She is the host of The Sex Talk. Connect with her on Facebook or Twitter.