I know exactly how that feels. I had this very same conversation once with a Leo female who couldn't understand why I (a Taurus) could stand living in the same place my whole life and why I didn't go on adventures. I told her, because I have learned to value life by being very still. I need to reflect on my experiences and internalize them in a quiet personal way that requires time and patience. She is a person who will breeze through someone's life, and leave them wanting as she goes from one fugitive experience to the next with very little reflection or internal consumption of the impact she has caused.
I think in some ways, you are very still. The people who leave you are simply passing through and are there to share their story for only a short time. I hope that we both find people who will stay forever. Everyone I've known has left me as well.
reach out to THEM!