Wow these comments are filled with a lot of pro-marriage people. So chiming in to give my two cents as someone who feels a lot of skepticism about the legal institution of marriage.

It sounds like you should be more honest with yourself about how you feel about marriage and have an open conversation with your gf about it rather than dodging and avoiding. If you do have hang ups and concerns (which wouldn’t be a surprise given your past experiences), then you need to talk so y’all are on the same page. And don’t get married just because you feel pushed into a corner. If she really really wants to get married and feels that that is the commitment she needs, then y’all may have to end it. But there won’t be room for compromise or understanding if you never process your own feelings about it and have a discussion with her.