Love addiction is a state where you feel anxious without the person you love and can think of nothing but them. Spending time with the person you love is so enjoyable that you can't focus on anything else.You constantly wait for their messages, neglecting your other responsibilities and daily life. Causes of Love Addiction One cause of this condition is a substance in the brain called "dopamine." When you are with the person you love, a lot of dopamine is released, making you feel very happy. However, wanting to always feel this happiness can make it difficult to focus on ...