Jenni.... don't make yourself sick over what you imagine other people think! Often people ask things like that because well, they don't know what else to ask and it's a "traditional" sort of thing.
Know what I did? I decided what I want to be like when I am an old old woman. I want to be one of those really old ladies who still travel and have no fear about just doing silly things while gone! (Then again.... I also want to be an old man who plays chess in the park... haha... alas, I won't get that one!). If I happen to be married or have kids or grandkids at that point in my life, well, I am STILL going to travel!
And that makes me happy. I know what I'm aiming for and it's very much how I live my life already. Travel is one of my biggest passions, and I WILL be that little old lady!
So... I'm celebrating turning 30 by going to a new country

It is going to be the best birthday ever. And I will be there all by myself.
Just tell society to Eff It.