I cannot speak for them. But in general, smaller countries tend to align themselves with larger allies when they feel threatened by larger powers. If you look at Ukranian history from before world war 1, they have always been under Russian threat. Russia's invasion of Georgia is the type of thing that will make a country like Ukraine look for larger allies.
In my experience working with Ukranians, they have always been pro western. Even the pro Putin Ukrainians from the Eastern part of the country (that I am in touch as and have worked with) want to settle in US/Canada. Those of them who got here want to move their entire family here somehow. Their attitude is very similar to that of South Asian people.
So take your pick. For security or economic prosperity, it is for them to decide.