Know how you feel babe. I have also felt like crap for most of my life. I am 35 now and on an existential mission. I wonder if you have a touch of needing to soul search? I was dx bpd, schizoeffective and bipolar. The light of my life and the reason I still exist is my son.
So I have a mentall illness? My spirit is what needs help at the moment. Not my mind. Suffice to say they are closely linked and I take my meds and see my shrinks, whom I love. Gotta be responsible. But I need some deep, bone-marrow self love and thats what I am working on.
I need some chunky soul soup to sustain me and keep me warm......sick of feeling so cold about everything. My mission is very painful but it is worth it.
Love your tired, sad self and be kind to it. It will turn eventually. Self love is like perpetual motion.......once it starts it keeps going for eternity. Good luck.