I know this is gonna be too long for most people to read but here we go anyway, Massive wall of text, 994 words, inbound.
I'm sorry what? I assume you're Russia so I can see you arguing for your point here but I'm afraid you are mistaken.
78% of the Ukrainian population identifies as ethnically Ukrainian with only 17% identifying as Russian. Ukrainian is the official language of the country spoken by over 68% of the population. There is a Russian minority in the East but that is it.
To say that Ukraine is closer to Russia is false and an over simplification of the situation the country exists in. I would argue that Ukraine isn't closer to the West or Russia. They have been pulled in either direction for centuries.
Around the end of WWI the pulling began in earnest. Various factions including those from the USSR, Poland, Ukrainian nationalists and more groups fought over the land and 1.5 million people died. Eventually the faction siding with the USSR one and Ukraine was absorbed into the USSR. It was hardly a peaceful event.
Then, from 1932-1933 over 10 million Ukrainians died of starvation thanks to Stalin, ironic because Ukraine is the world's third largest exporter of grain. Then Stalin deported the entire native population of Crimea, the Tatars, to central Asia.
He then proceeded to move large amounts of Ethnic Russians into the Crimea and industrialized eastern part of the country essentially to rape the country of its natural and industrial resources as well as to give the USSR a buffer zone from NATO and a port on the Black Sea because in case you hadn't realized, Stalin was a bad dude who more or less wanted to hold back the western expansion under the Marshall Plan long enough so he could build his forces up and likely invade Western Europe. Although the invasion never took place it is likely these were his motivations.
After his death, Khrushchev transferred the Crimea to Ukraine because of his ties to the country and the fact that Ukraine is where Crimea gets all of its food, water and electricity. Plus it is easier to manage a place that you are actually physically connected to which Russia isn't.
So after the breakup of the Soviet Union in 1991, there was a referendum held in Ukraine in which 90% of the population including a majority of those in Crimea voted for independence from Russia.
2004 is when a lot of the trouble began. In an election that was widely regarded by outside observers and those in the country as fraudulent, Viktor Yanukovych was elected president. He was incredibly Russian friendly.
This lead to the Orange Revolution where Viktor Yushchenko led massive street protests in Kiev. Where he was nearly killed by a mysterious poison, which many point to be Russia's doing as there were some eerie similarities between it and a few other poison deaths linked to Russia and Putin.
Eventually, there was another election and this time the election, which was declared open and free, Yushchenko won and by a hefty margin.
However, he wasn't a very good president. Despite being an economist, he wasn't actually that good at running the economy. Then, as he was friendly with Europe, Putin shut off the gas supply to the country which had far reaching and negative effects in 2006.
By 2010, in open and free elections Yanukovych ran and won. All was well for quite a while then suddenly, he changed his mind and decided that he didn't want to go closer to Europe and abandoned long standing negotiations with the EU and announced Ukraine would ally with Russia.
This was massively unpopular and protests erupted in Kiev. They eventually grew until February 20 when many were killed by military and police. Suddenly Yanukovych disappeared the next day, taking with him a sizeable portion of the countries wealth and leaving the protesters in charge. Then installed a new interim president to prepare for new elections, at which point Putin marched forces into Crimea to protect "Ethnic Russians and Military installations." The regular forces were proceeded by mysterious soldiers not identifying with any nation who claimed to be Ukrainians but eventually turned out to be Russian Special Forces. This violated Ukraine's territorial integrity which is a big deal.
Eventually in an illegal vote that was most likely fraudulent the population of Crimea voted to ally with Russia.
Then lately, the same mysterious soldiers began showing up in the Eastern part of the country and rallying protesters to their side and invading and destroying government buildings. Just like in Crimea earlier. It is likely Russia may "move forces in to protect ethnic Russians" like they did in Crimea. They may even take over the entire country.
Why? Because of natural resources and also because Russia, which is at a military and economic disadvantage to the west and is much weaker, doesn't want their neighbor allying with the EU and possibly NATO. That may put western forces on their doorstep. More importantly however, it would open up trade even more with the west and Russia goods and more importantly Russian natural gas would be less desirable hurting the Russian economy and Putin's own personal wealth.
That is what is going on right now and I'm not saying one side is better than the other. I'm just trying to illustrate that the pull between East and West isn't new. I mean the word Ukraine means borderland...
What Ukraine needs is stability and long term stability so it can grow and form its own identity and form healthy relationships with both the west and Russia without being controlled by either.
Most of this information can be verified by a simple Google search but let me know if you want specifics. Political Science and International Relations major here and I have done independent research on the topic. Fairly qualified here and I'm pretty sure everything above is correct. I apologize for any oversimplification or for leaving anything out.