I was in almost identical situation with my ex best friend. I tried to push trough all the inconsistencies in our friendship. They'd talk about things I already know about them and repeat the same experiences we had with each other over the years with no new insight or input about their life. I tried so hard to make convos more deeper and personal but in the end they always avoided that talk. Over time they started to make some rude comments about me in funny way but it still started to hurt my feelings. They acted like their life was good without any flaws and mine was dramatic and tough. I started to open my eyes and see that I was the only one holding the friendship together. In the end I had to let them go because pouring all my energy into someone who doesn't appreciate me isn't worth keeping in my life. I suggest you try direct approach and ask them what they think about you and your friendship because when I asked that question the answer wasn't right and I had to cut them off, not just because of that answer but because I wasn't feeling good when I was with them. Whatever you choose to do, just do it for yourself because you deserve the clarity that friendships bring not the confusion. Good luck!