Have you tried working in a completely new workspace?
It might be worth a try, seeing as it's not working at all for you at the moment.
I've had problems in the past when my workspace has gotten messed up, and I've had to manually fix or remove configuration files. If it's crashed on you then it might have left your workspace in a bad state.
I'd try a completely new workspace, then create a new project - don't copy over anything from your previous workspace. If it still crashes all the time then it must be the Eclipse installation or one of the plug-ins. But you might get lucky.
It won't be any consolation to you, but Eclipse is usually pretty stable.
When I started with it a few years ago I got frustrated with it too, and it used to crash on me. Maybe it's got better (for most of us), or maybe I've just developed work habits that don't cause it to crash.
Mark