lack of libido is making me feel broken

so i'll start by saying i used to be VERY hypersexual up until a little over a year ago. i didn't endure any (new) sexual trauma or anything like that, it feels like my sex drive just up and left one day. i did have a pretty rough/traumatic year in regards to housing situations and hospitalizations so my mental health has definitely declined.

i'm in a relationship (our one year anniversary is soon) and he's very patient and understanding and does everything he can to make me feel comfortable and desired and i'm very attracted to him. his libido is much higher than mine and it makes me feel so guilty and broken, like he deserves better. he wants to work on it together and so do i but it's so depressing to want something so badly and yet you feel physically unable. i never get turned on organically anymore like i used to and sometimes i have to take breaks or stop when we do stuff because i just feel so overwhelmed.

i don't want it to be like this anymore. i know logically that he won't leave me because of it but BPD brain tells me otherwise and i'm scared he'll get frustrated and give up. i'm just really tired of feeling like this. any advice or encouragement is welcome and appreciated (or if you just relate) but i'm mostly venting because i feel so awful.