We all (or at least most people - there may be a few people out there who have charmed lives!) go through periods like this.
Is your dissatisfaction all related to your love life? By that I mean are you basically happy with other aspects of your life - where you live / friendships / hobbies / your health / job / family links?
I ask because, if there are other parts of life that are less than great, it's a good idea to work on those and stop thinking about your love life. By focussing on something else, you can make your life more enjoyable (new hobby, enjoying time with friends, job satisfaction) which makes romantic relationships less important and at the same time more likely. By that I mean that you will be happier, more confident in yourself and that is attractive to others. And even if you remain single a bit longer, you'll be happily fulfilled and single.
If everything else in life is brilliant (and good for you if so!) and the only think missing is a good relationship, then I'd say you've got a great foundation to build on. And a good relationship will come in time, if that is what you want.
Much better to be happily single than with the wrong person, so work on the stuff you can work on and be open to relationships, but ever mindful not to accept someone just because you want an 'other half'.
Sorry if that's no use. But I think so often when we want a bf / gf / partner, we focus on that and forget about the other things that actually make our life better with or without a DP.