Hello brothers, how can i die to the desire of having a girlfriend, i know God is sovereign and i may fail in finding a partner so i want to find a way to be content with Christ and stop this fleshly desire because i want to be happy even if i remain single forever. Sometimes i feel like the only way to get a girlfriend is selling my soul so i dn't want that and maybe wanting a girlfriend is bad.
Selling your soul, not really possible.
Billions of people alive/have lived, did they all "sell their soul" for a partner?
The desire to have a gf is not wrong. Being overly focused on it is.
The answer is not losing that desire, but rather not letting your happiness rest on it. Plenty of people have learned to be happy without a partner, even if they want one.
And I can tell you having a partner doesn't guarantee anything. That's the thing most people who focus on finding someone miss. It may work out, lead to a good marriage and a long life together. Or you could argue for months and within six months get your heart broken. Or spend years in a relationship, only to have it end. So no need to rush into anything.
And I'm guessing you're a teen, which means even less reason to date. It's rare most teen relationships last for very long.
So there are a few reasons not to be in a hurry to date.
Not to mention the overly dramatic belief you'll never meet anybody.
Rather use your time single to do things you want and grow and become a better person. That way if/when you do meet someone you'll be content already and not wrongly rely on them to make you happy.