Sorry, whilst I sympathise, this is not your body that will be put under incredible strain and it is not your life that will change forever once the baby is born.A foetus is a parasite and there are health-related implications that many men don't consider or appreciate when a woman becomes pregnant. My grandmother lost all of her teeth during her 4 pregnancies for example.
If she doesn't want to have the baby, whatever your feelings are on the subject, you should support her decision unconditionally. Most importantly, you two need to communicate better because I doubt she wants to abort on a whim, I expect she has valid reasons and you need to hear them before you get swept away with romantic notions of parenthood.
