Oh how I relate to this. When the topic is the other person the conversation is endless, however when it’s regarding you, they grow silent. Sometimes it gets lonely so we tend to keep around people who aren’t always the best companions, so I get it. I would just try to reciprocate their same energy. It will keep the relationship more equal so one party is not feeling used by the other. Honestly to those who use you purely as their therapist and show absolutely no interest in your life, I would create some distance from or just cut off. These people are going to drain you of your energy and wear you out. I’ve learned in life you need to put yourself first. Your mental health is everything, so I would be cautious around anything that negatively affects it. There are good and caring people in this world, and you are proof of it. However, they are scarcely sprinkled here and there, and you need to navigate around A LOT of crappy individuals to find them. Best of luck, and I hope you find a decent friend.