Commitment Crisis

It sounds to me like you are afraid of commitment. Explain your fears to her: be firm. If you are fortunate, it will force a conflict. If you handle this conflict properly, you might learn something new about yourself, or might discover that your fears are either un-justified or justified, helping you to make your decision.

There is a small chance the argument may cause a breakup.

One year, and she's already pushing you to commit for LIFE?! Run. FAST.

To be fair, you should understand that you can never be sure it will work out. Every relationship can fail, no matter how perfect it seems. But if you let that stop you, you'll never be able to commit to anyone, ever.

But one year is far, far too short a time. The one year mark is when you start talking about moving in together, and maybe sharing a cat or a fern or something. Not eternal shackles of matrimony.

There are no guarantees in this life, other than this one: at the end, you will die. Between now and then, are you willing to risk actually living?

I have heard so many stories about people changing after they marry ... blah, blah, blah. Always remember this: Not one of those stories was about the specific woman you love. Yes, other marriages have gone wrong (my first among them). So look at them and learn, and try to avoid the mistakes that led to the problems.

MarkDF has a good point. See if you can ease into a stronger commitment by moving in together.