There are rumors of war with Putin employing his troops around the border and in Ukraine which seems rather unfair.
The EU is at least just as, and probably much more, greedy as Russia when it comes to Ukraine. It is hardly in any shape to offer Ukraine anything substantial economically, except of course if we are counting economic ruin, in the form of increased competitiveness that would shut down many Ukrainian industries, as well as astronomical costs associated with implementing insane IMF requirements, which would bankrupt not only the country, but its people directly, through higher costs on utilities, etc. It seems that Ukraine's open markets to Europe will only benefit the few industrious western European states that remain (i.e. Germany, France) by granting them access to another ~50 million consumers, while out-competing Ukrainian companies and driving them out of business. This has happened to nearly every country that has joined the EU in the last few decades - the shutting down of national industries and manufacturing alongside a flood of European products. It is no wonder why most EU countries are experiencing either economic stagnation (at best), or outright failure (Greece, Spain, etc.). These countries don't produce anything of value anymore! Many ex-Soviet states had factories completely disassembled and shut down after joining the EU, whose "European values" did not protect them from the financial crisis, or the mass unemployment that resulted, or demographic collapse (the list goes on). If Ukraine opens its markets with the association agreement (the EU won't go so far as to actually allow the country to become a member), it will only postpone the inevitable collapse of the European Union due to the policies described above and their results.
Also Ukraine's economy is too closely tied to Russia to just switch alliances so quickly. Let's not forget that Russia is not the Soviet Union, it's simply a hybrid of communism and capitalism sprinkled with authoritarian rule. That said, Russia is still powerful and not a country to be further agitated by stripping it of a major partner. Besides, the EU is no better than Russia. Their nanny state rulers France and Germany have stripped Eastern Europe of its economic independence. Even older EU countries like Greece and Spain aren't free from the manipulation. Ukraine made the right move by sticking to its traditional allies. They can reform their country ON THEIR OWN if need be. If this turns into civil war, trust me that Russia will be the only country willing to help Ukraine, and we all know whose side they will take....
Aah some of those useless citezenship and history loessons finally came to use