The state of being so lonely and so insecure, due to lack of esteem, that you will date/marry or have sex with anyone. You dont care whether or not it is bad for you, but only how "good" it feels to have somebody you think is compatible with you and likes you for yourself. You deceive yourself into thinking that this person makes you happy, when in reality it's only the feeling of love that makes you happy. Instead of waiting for the right person to come along, you settle for someone who is much less ideal for you and can make your life even more miserable.
I feel so bad for Donnie right now. He is such a good guy, but just heathered right now.