I didn't lose the weight I promised I would (to my boyfriend) and we've been fighting lately. What to do?

Ok and I look like a possum in the morning. Honest I gained like 10 lbs since he last saw me... and then suddenly he tells me he's visiting tomorrow and I don't know how to refuse to see him. I'm just so upset about everything and I think he'll realize he doesn't really love me at all, now that I'm not thinner.. but fatter! Honestly, I look like a possum in the morning. I wish I could run away and pretend I don't exist tomorrow.. what do you think you fellow optimists? Be real.