I've never had a girlfriend, never even been kissed. It's a major contributor to my depression.
A month ago I was in the same situation, and frankly I figured that's just the way it was going to be. I mean, if I've gotten to 27 without even a hint of a relationship, there's a certain momentum there.
On May 1st I met a girl at an aviation club event. I didn't really give her a second thought at first, actually, but it didn't take me too long to realize she was paying me more attention than most women do. This past weekend I got my confirmation....she's definitely interested (though I have no idea why), and just aggressive enough about it to cut past my own confusion on the matter.
I have no idea where things are going to end up, but the point is----you never know when things are going to change abruptly. Finding a hobby that gets you out of the house certainly helps, though.