NEVER!!! I'm 24.
I just don't really see the point in getting married. My boyfriend and I have been together 3 yrs and we live together (moved in together 3 months ago), I don't see how it would change our relationship (we're both atheists anyway, so it's not like there is a religious reason).
There is this goregous rock at Tiffany's I had my eye on. I wouldn't object to wearing that as long as I didn't have to do all the wedding crap that goes along with it!!!!