"What 'Tis to Love?"

I am one to become very emotionally attached to people. I wish that wasn't so, because it has gotten me very hurt in the past. But why is that? Why do we love? According to Helen Fisher, romantic love is not an emotion; it's a drive. For me, I don't want to be alone. The more I think about it, the more I fear being alone. But I am afraid of being in any kind of relationship because I become very attached. The more attached I become, the harder it is for me to let go (that is if the relationship comes to an end). After watching that TED Talk by Helen Fisher and listening to lectures from my professor, I still cannot understand the thought of love. I cannot understand why I become so emotionally attached to people. I also don't understand why women can treat love (or infatuation) to be nothing. Of course not all women are this way, but most of the ones I come across are! Perhaps I just have a bad taste in women.