Pluto is the planet of death, rebirth, and destruction, and it is the ruler of Scorpio. The 7th house is the house of relationships, marriages, and partnerships. When Pluto enters the 7th house, it indicates that you can have some bad luck when it comes to your relationships and partners in life. You could be attracted to very manipulative, destructive partners, and partners who try and mess with your mind and manipulate you and your emotions.
These experiences could cause you to form a negative approach or viewpoint regarding relationships because you have likely been exposed to a lot of negative people in the relationships that you have been in. With this aspect, at some point in your life, you will meet a person who is going to change your entire life. You will have to let go of the things you know when you meet this person. You might have to let go of things you are comfortable with, or the things that are part of you. You will have to release these elements of yourself for you to be reborn again. This person that you will meet throughout your life will make you a whole new person. They will destroy the old you, and they will rebirth you into this beautiful, wondrous new person, with amazing strengths and capabilities.
Only once you have found a partner that can change you for the better, that can help break down the old you with your negative habits, thoughts, and inclinations, and help shape a more positive person, that is when you are with the right person. When you are with people that continuously break you down and consistently let you go through drama, chaos, and struggles, and they do not help build a better version of you, then you are with the wrong people. You need to find the right person that will allow you to be the best version of yourself that you can be. You will end up finding yourself in the right relationship. Your inner search and journey you are going through in terms of trying to understand yourself and the universe will come to you through another person.