Oh, boy , do I know what you mean. I was raised in a very old fashioned home and I felt like an old maid by 21.
I dated rarely but was so desparate and lonely that I went out with anyone who asked me. Big mistake because I didn’t take the time to get to know those guys before I went on a date, so I would break up with a guy, feel crummy for quite a while, go out with another bad match, and follow that pattern for several years.
I met my husband when I was 24.
My life at the age of 48 is SO different from what I hoped for and expected at 21. I expected to be a stay at home wife and mother, just like the women I grew up with. Instead, I own a business that my late husband and I started, I had cancer, surgery, chemo, etc. So many changes over the years that I never, ever expected or planned for.
Now at the very old age of 48, after being married for 20 years and now having a daughter, two grandchildren and being widowed, I hope to give you encouragement.
I have a daughter in your age range, I know her friends, girls she went to high school with, and I was a volunteer coach for girls sports during the high school years. So here are my words of wisdom.
Many girls/women in your age group are not really very serious about life. Many (or most) are influenced by the media, Brittany Spears, Lilo, etc. Most are not ready for a deep, serious relationship. Many are still interested in men with cool cars, men who look pretty like the models on TV, etc. These are the very women/girls you don’t want to get serious with. They are searching for what they want and bouncing around from this trend to that trend but many are not ready for a “nice guy”.
Be patient. Make friends with both women and men. A calm, stable, good hearted “nice guy” with a nice smile on his face becomes more and more attractive as women grow up. Get involved with a group or organization YOU like - Sierra Club, volunteering at a homeless shelter, be an usher at church (so nice women actually see you in Church), neighborhood association, YMCA, etc. Perhaps you will meet a woman who has the same interests you have, but participate in groups/activities that YOU like, not just to catch a woman. If your hope is to have a wife who can be a stay at home Mom, pay attention to your job/career and be smart with your money so when you do meet and marry you will be in a better position for this (and it makes you more attractive to a responsible, mature woman).
Life looks dark and lonely right now, but it will not always be that way. Trust God, he knows what he is doing. I promise.
)
And I didn’t meet him until I was 21…
I’m pretty much giving up myself at this point. Being the old fashioned type I wouldn’t ask a guy out. Tried that never worked for me. So where does that leave us. Well I’m in my late 30s so I’ve seen a lot of water under the bridge so to say but you’re only 21 and have years yet. I wouldn’t give up the game till you have some experience playing. I know it seems rough but in your age range people are still learning and growing and evolving into maturity. Give it time. At my age all that is pretty much determined and change is harder.
Pray for God to lead you to the right lady and maybe you are ready but she isn’t quite yet so keep the faith. In my case well I’ve still got a little hope but unless someone really special shows up I’m probably calling it a day. 
Being single isn’t so bad. 
