I am not going to tell you how to feel, or how you feel makes you want to act, but I would say that, all good things do come to an end, you seem to be able to grasp that much even as angry as you are. Personally I think you should try researching another server, or maybe even try starting a guild of your own, and networking with your friends until it gets off the ground.
That being said, I think when it comes to thing like this, it is better not to take relaionships or situations for granted.