Sometimes the love you need to fìnd is love for yoyourself.
I always find it rather telling when people in unhappy relationships jump to 'what if I never find love' as a first question. It suggests they are likely in relationships for all the wrong reasons to begin with. That they aren't and perhaps, have never been happy with themselves.
Can you sit with yourself? Are you happy in your own company? If not, why not?
For example, I was reading a book about meditation lately and the writer says when he first started, he realised he didn't like himself. He couldn't sit quietly without the voice in his head criticising him and his life choices.
This reminds me of that sort of thing. That somewhere along the line...you lost track of that self love.
Now I'm not saying 'what's wrong with being single?!' (Though, nothing). I'm just pointing out, you're skipping huge steps between 'how do I get out of this relationship?' And 'what if I never meet the right man when I leave?'. There's a whole journey invetween those things. Or, should be. So why are you worrying about running before you can walk?
Focus on getting out of this relationship and exploring yourself, not just finding but exploring. Learning what makes you happy outwith men and relationships. Considering your needs. Then once you are happy in yourself, and only then, consider adding some added spice to your already full life in the form of a man. And if it doesn't work out, you won't care much, because you know you yourself are enough.
But for now, get out of this 'relationship' and find yourself again.