Unfortunately I don't think you're alone in thinking we should go, and I'm in the UK.
We (or, let's be honest, our government) haven't been good team players. That does not mean that all us citizens don't want the EU to develop and thrive. Yes, there are a large number of my fellow citizens who vote UKIP, but many more who don't.
The matter is going to be cleared up in a referendum, hopefully sooner rather than later. What I would like the rest of the EU to do is budge not one inch to Cameron. Give him nothing. Make the referendum not one on any proposed reforms, but one on the EU 'as-is'. OK, he will have to campaign for an exit, and if we then vote for an exit (most probably), then you get your wish and we'll be out. Then by all means continue with the EU project without us (but be willing to welcome Scotland when they leave the UK, as they will if the UK votes to leave the EU). Go forward with the fantastic vision that originally started the whole thing.
However, what I hope is that even with no reforms, we will vote to stay in (unlikely I admit). After we have agreed to stay in will be the time to think about any reforms needed (which there may be), but at least we'll (the UK) be committed partners rather than wreckers on the edge of things.
I understand the frustration, but some of us in the UK are pro-Europeans and would like to be together with the rest of our European neighbours in a vibrant, dynamic and strong EU.