When you start a relationship (I am talking about what we call love) you are an intruder in an aedipal triangle. Try to know something about the family antecedents of your partner so you may understand if you are playing the role of her or his father or the role of her or his mother (or maybe both in alternance). The future of your relationship is most probably written there in advance.
Joseph Edward Soice: "First they loved me as they loved their dad. Later, when I questioned some aspects of their behavior, they hated me as they hated their mom. Bullshit!."