I definitely have my days when I feel lonely and isolated like you do.
But loneliness doesn't scare me anymore.
I was once married to a man who was not the right fit for me and you would be surprised to know how ALONE I felt.
You can get a ring from a man. You can get his last name.You can share his bed . You can even have his child.. and still feel ALONE
I am 100 times less lonely now than I was when I was married and that's because I now surround myself with people who cherish me in a way that I didn't feel cherished in my relationship . I also fully engage in all the wonders life has to offer from dance class to hiking to travel and beyond. the world is your playground!
The fact that you are young, lovely and presumably kind and smart, leads me to believe that you are not single because you are desperate.
I suspect that instead of settling for a guy with the qualities you could just live with, you have chosen to wait for a man with the qualities that you CAN'T LIVE WITHOUT.
If that is the case , then I applaud you! You will be way more lonely in a relationship with the wrong person that in a right relationship with yourself .
Love might be right around the corner for all you know. Just keep your heart OPEN. I'm rooting for you. Good luck!