Getting married

dont get married becuase in the end it will not work out. if you don't want to marry her then tell her that.

Do you love her? Do you want to spend the rest of your life with her? What is the reason that you don't want to marry her? What you should do depends on why you don't want to get married. It sounds like it's time to do some serious thinking here. If you aren't in love with her enough to marry her, it's probably time to let her go so that she can find someone who truly loves her.

Well definately don't propse to her if you're not even ready to be married to this girl. Divorce rates are high even with the both parties wanting to get into the marriage to begin with, I imagine your chances of divorce would be even higher since you don't want to be in the relationship. Sounds like this girl cares about you a lot if she wishes to become married to you. Do you feel this way about her? If not you maybe should get out of the relationship before she gets really hurt..

Be straight up and tell her..

I think you should have a talk with your girlfriend and explain your ideas to her and ask her about her thoughts on it.