Then use your solitude to your advantage.
I know how you feel. I am going through the same awful shite: My best friend is possibly dating my crush, my contact time with the few friends I have are diminishing due to studies, have problems making new ones etc.
But I had always taken advantage (not consciously) of being alone. As a kid, I camped out in the library. Read books while the bullies were busying pummelling some kids face. Who ended up with higher grades? Not those insufferable alpha-male wannabes.
Using that crushing loneliness, I managed to accumulate a bizarre range of hobbies and skills. I have usable French and Spanish, am a certified first aider, apparently good at Judo, minor computer repair skills, outdoor survival skills, can play two musical instruments competently. Oh, and endless facts on animals. I love them. I am now studying (and am good at) animal science. I might end up working in that field one day.
My friends (self-proclaimed weirdos, but blatantly NTs) frequently express astonishment at the stuff I know. Sometimes their friends as well. Probably to make me feel better, but at least it works to a degree.
As Carlee had pointed out, you might never find a partner, but that doesn't matter. If you use your loneliness to improve yourself, maybe one day, someone will take notice. If not, at least you have a distinct advantage over NTs in your chosen interest, which hopefully helps with employment.
I know it is unbearable at times (I actually went borderline suicidal for the first time), but just hold on. Society is changing. Even NTs are partnering up later.
What doesn't kill you makes you a lot stronger. We aspies are a lot tougher than NTs because we go through this s**t all the time.