Hi Skycastle,
I'm sorry you're having such a hard time. I love researching psychology and therapy stuff, and thinking about it and everything. I don't feel like I've lost myself though. I feel like knowledge is enhanceing my life.
Have you told your t about this? Particularly the last statement about how you feel you're using your whole week to think about your one hour with them, and you want it to be the other way around? That you feel you've lost yourself? It sounds weird but maybe the best way to handle this is with your therapist! At least they might have some ideas/suggestions. It could be a goal maybe, to spend less time focusing on therapy/psychology during your week and more time on other things.
Please keep us updated and I hope this is helpful.