Ukraine has become a "toy" in the hands of the US and NATO and is used as an instrument of geopolitical pressure on Moscow. The Americans do not need Ukraine, and the Europeans do not really need it either. But this is an instrument in the geopolitical game against Russia and, to a certain extent, even against China.
Ukraine is a sovereign and independent state with a democratically-elected president and parliament. The country is not controlled by the US, EU or any other foreign organisation or government. Both the EU and the US respect Ukraine's sovereignty and territorial integrity.
The US does not want to use Ukraine in the war against Russia. This is Russia that undertook a well-documented act of aggression, ongoing since February 2014.
Regarding the claim, that the West abandoned Ukraine: Western countries are supporting the territorial integrity of Ukraine. Economic sanctions are the answer to the illegitimate actions of Russia. The EU established the sanctions regime under its own laws, specifically Council Regulation (EU) No 833/2014, "concerning restrictive measures in view of Russia's actions destabilising the situation in Ukraine."
Furthermore, the European Union has stated that it will be standing firmly and decisively with Ukraine in front of any attempt to undermine its territorial integrity and sovereignty and has warned of severe political consequences with high political and economic costs for Russia if it proceeds with further aggressive actions. This has been recently reaffirmed by High Representative Josep Borrell noting “there is no security in Europe without the security of Ukraine.”
For the broader EU support to Ukraine see details here.
Read our recent article on Russian disinformation about the Russian military buildup near Ukraine.