You didn't just fall for your partner; you learned from them and look up to them as a mentor who can teach you about the kind of person you want to become. You're able to talk openly with them about anything and everything that comes up, and they understand you really well. Through this openness, you can grow to understand yourself better, which can aid in your career, your personal relationships and all other areas of your life.
Your lover has a wonderful effect on you, and you do the same for them. Socially, you encourage them to make the most of their contacts. You both have fun when you go out together, and you also point it out when there's a social opportunity that could develop into something more. You make each other feel strong, motivated and even lucky. And your lover makes you feel smart, as if you're more able to put things together in terms of what your social experiences mean in the larger sense. Their grasp of philosophy is welcome, interesting and helpful to you. This aspect greatly increases your chances of continuing this long-term bond, because it fosters such warmth and affection between you.