Lila, if you've given yourself a 'date to quit' mentally then make sure that you are able to back that up practically. You needn't make a big thing of it but get your Plan B worked out so that IF (and more likely, WHEN) you realise that nothing has improved, you are ready to go.
Get your mind focused on that - home, job, money, support - so that you will at least have the comfort of knowing you have a viable plan ready to implement and you just have to simply follow steps A, B, C, etc. Believe me, you'll be glad of that when you finally are at rock bottom with this and can't see straight anymore... you'll be able to go to point A on your plan and work steadily through.
You'd feel a whole lot better if you could make the decision to end this now - or just after Christmas if you're hoping for a miracle - you could even end it on 'good terms', but just taking that action would do marvels for your self-esteem. I don't think you're ready to face that though, your 'had a talk' post tells me that.
I'd like to say 'Good Luck' to you but it would be more appropriate to say 'Lila, Wake UP' ... I'm sorry to be so blunt but however you feel now, you will feel worse when you're at the realisation that he doesn't love or want you at all.