My likability is ruining my relationships with my friends, and

>>18637345
>how can I become less desirable?
don't
>How do I turn someone down the nicest way possible?
don't
believe it or not you're doing guys a favor when you make it completely clear there is no chance and never will be a chance.

alternative advice:
help your female friends be more attractive and have the kind of success with guys you claim to be having.

pick up an unattractive trait such as obesity, smoking, drug abuse, child molestation or watching anime

>>18637345
Get used to it, girl. That's the role you've got to play in this life game as woman.

Next step you'll have bitchy catfights, backstabbing, and your friendzone guy friend getting all drama behind you, or worst he's actually a psycho stalker.

I wish you good and hope you'll find a partner who's compatible with you in long term relationship, but get used to it.

>>18637345
What exactly do guys brag about with you?

And when it comes to turning down guys just be straight with them. Don't be that girl that says nothing at all or leads them on forever. If you aren't interested tell them you're not interested because you're trying to date X guy. You might get some people who promise to live up to some bs standard but 90% of guys will be ok and move on and satisfied that they tried.