Depending on what you are looking for, and what the ages of your children are.... what about activities involving them (play groups, or school groups) that would allow you to interact with other people.
if you have even a little bit of spare time, look into volunteering (check out a site called
www.volunteermatch.com, they've got tons of opportunies all over the place, and it's a great way to get out and meet people.
There's a "dating" organization called Parents Without Partners, you might be a little young for that demographic, but you never know...
You're a wonderful young woman, you shouldn't be sitting home feeling sad... You should be enjoying life.