What I think:
"I'm really struggling at the moment. I'm scared that you don't really know me at all, because if you did you would realise what a worthless piece of shit I am. I'm scared waiting for the day to come that you realise this. I know I'm no fun to be around at the moment and eventually you're just going to get bored of it. I love you more than I have ever loved anyone, and I don't think that's enough. Eventually you'll realise that you could do so much better. And the main reason I'm scared of losing you is because having you in my life is the only thing keeping me sane at the moment. Losing you would be like having the floor pulled out from under me, I know I wouldn't be able to keep it together any more. You're the only thing keeping me from cutting because I wouldn't know what to say if you saw the scars. And you deserve so much better than this. You deserve better than an ugly, stupid, annoying waste of space. If I wasn't so selfish I would let you go find someone who is actually good enough for you."
What I say:
"I'm fine."
