Just thought I'd throw in a few encouraging words for you from someone for whom it has worked

I'm 23 and live with my 25 year old boyfriend, and we couldn't be happier. If anything, it has caused us to realize that we DO want to spend the rest of our lives together, and it's hard for either of us to imagine living apart again. We are talking of getting engaged in the near future (as soon as his work situation permits).

Also, two of our friends who are slightly younger (25 and 21) have lived together for quite sometime, and their wedding is coming up in just a few months

Only the two of you can really decide whether it's right for you. I know I was nervous when I moved in, wondering if he would never want to get married if I lived there, or what would happen if we break up. I suggest that if you do do it, have a second bedroom, even if you don't use it. I have "my own room" in our house, and it's great for when I need to get away and have my own little girly space.

Good luck to you, and let us know what you decide!