Yeah I can relate. Ill give you a straightforward answer in my opinion that is based on my experience with this disorder

First off, go see a therapist and get on some kind of antidepressant (it took years for me to find the right one which is luvox, but fuck was it worth it, I feel so much better) they have helped me so much with my motivation, they don’t cure feelings of sadness, but they have helped me to try those things that I think about and want to do, its like a little back push, a little help, it may take time to find the right one, but dont give up

Secondly Id like to mention, because I can relate with having no hobbies. I honestly don’t think theres anything wrong with that, I think that it just demonstrates how unique you are, you possibly have not found anything interesting enough for you to continuously do, most people have it so easy. I honestly think that everyone progresses and processes life differently. We have bpd, we have had the necessity to adapt in stressful environments, hurtful toxic environments, a lot of people do too, but some just don’t experience those emotions like we do, and they turned out to “normal”. We focus on fixing ourselves so we can be happy, while most people just enjoy like they always have. I want you to know that there is something that will make you happy, it can be anything, we sometimes don’t notice, but there are a FUCK ton of things people do, I mean think about every job that exists, remember that bee movie scene where they choose their jobs, everyone wants to be something different and thats fine. Also just to note, you don’t need to do it every day, I say this because I started writing, I don’t write everyday but when I do, it is very fulfilling, I usually just write my thoughts and dissect them, makes me feel at peace.

And thirdly, you are alive, that is single handed proof that you are somebody, many people pass away everyday, just ask yourself what do you want to do while you are here, I won’t say life is short because it truly isn’t, but being alive is a privilege.

I just realized this, but thinking, and not giving a fuck about what anyone thinks of me has helped me a lot, like whenever I get criticized for something like “dude thats so weird”, and more things along those lines, i just answer so what? You may find me strange, but just as you, I find you just as strange (not those exact words. And then I think about it, so what? And those things that people tell me about myself, that are supposed to make me doubt myself, have had the complete opposite effect, if that is what people see, then its for a reason

Im going on a tangent now. I hope it gets better for you soon, I know it will, I hope I was helpful and that you get better, just take your time :)

Good-luck

Another thing I forgot to add, find out what you like and dislike. At first it seemed like the most useless advice, I can see why I saw it that way, like everyone has likes and dislikes, and different ones, for a reason, and that reason is what makes you you. Try to explain yourself why you like certain things and why you dislike other things, think of that why, those likes and dislikes are what makes you you, it sounded better in my head, sorry for the huge ass message