I'm 61 and haven't married - so just imagine the comments I have received over the years. They get ruder as one gets older, but the thing to remember is that the opinions of those sort of people do not matter...I accept the fact that they haven't the capacity to think any more expansively. What is meant for you will not pass you by - do some travelling and enjoy life and these things will not concern you.
As an extra thought, my group of female friends got married at 27, 41, and 51(after she tested him out for 20 years). So to each his own...