I'm single too, and had sort of recently fallen into the trap of needing someone to complete me, and feeling very lonely (I had a horrible breakup with a man I almost married, and the loss of some other important men in my life, like my dad) - but someone told me once, and I have really taken it to heart, that "happiness depends upon yourself." Before I can be happy WITH someone, I have to be happy with ME. I am a whole person, and my happiness cannot be dependent on someone else. It sounds a little harsh, but I've been burned too badly to think of it any other way.
And besides, being single is FUN! There are definitely times that I miss having a boyfriend, but overall it's good! I like having friends set me up - I meet a new person, who might at least become a friend, and at the worse, well, it's a free dinner

Also, it's fun to go to parties and out with friends never knowing who you'll meet. But I like to flirt.

And I am learning to be emotionally self-sufficient, which (for me) is a prerequisite to having a healthy relationship! And I am the queen of bad, bad relationship decisions (ahem: don't work out your father issues by dating men 20 years older!), so I'm trying really hard here!
There are definitely some men on my horizon, but I'm not getting hung up on any of them at the moment. So in conclusion, single is a GOOD thing and don't let anyone tell you otherwise! And be open if people want to set you up or introduce you to friends, cousins, coworkers, because you never know!