You should understand why Ukraine decide to ally with west Europe. Because Ukraine want to join in the European market, they can sell goods to Europe, it's beneficial to Ukraine. That's the reason west Ukrainian pro-europe mostly.
Myanmar's situation is totally different. China can provide mutual beneficial economic development to Myanmar. China's economy is still growing at 7.4 percent. If they want to ally with USA, it's not an economic motive. There is a risk China govt attack it like China attack Vietnam after it signed ally with USSR. Otherwise, we can't find the reasonable motive Myanmar want to ally with USA. China never try to prevent Myanmar establishing economic relations with America.
Wot? What are you talking about? Do you really trust the bushit propaganda if China is not socialist country, America will cooperate with us? It's an excuse my friend, American use it to cover their real motive of geopolitical compete. Is Russia nowadays a socialist country? Obviously nope, they don't have communist party any more. America still make tons of troubles in Russian borders.