Europe will be dependent on Russian gas in the foreseeable future and that is a fact .
If the USA is ever in a position to export LNG , it will never go to Europe but instead to China and Japan where they will get higher prices ,
In spite of all the successes of the gas fracking industry in the USA , it is still a net importer oil and gas .
On a side note, Nitrogen fertilizers are made from natural gas and Trinidad is a big player here . America imports all its Ammonia gas from Trinidad and Tobago .
Not the foreseeable future - as I've pointed out Europe is making moves away from Russian gas, and Britain and the USA have large deposits from shale gas that will be exploited in the next decade.
The fracking industry isn't at full capacity yet. At the moment the USA imports its gas mainly from Trinidad (roughly 60% of its imports), and one of our biggest threats is shale gas, which is why we're so keep to get China interested in it. The EIA did a graph that nicely shows how Shale gas output will double between now and 2040 -
http://www.eia.gov/energy_in_brief/article/about_shale_gas.cfmAmerica is less likely to sell to China for strategic reasons, and depending how this crisis goes would happily sell gas to Europe at a loss as it has done in other sectors in the past for geopolitical reasons.
On ammonia -The USA makes 63.5% of its own Ammonia, importing the rest. Of these imports Trinidad makes up 62%, Canada 16%, and interestingly Russia 7% and Ukraine 6%. We export the vast majority of our ammonia to the US (5000 out of the 5300 thousand tons of nitrogen equivalent we produce)You can check the stats at the US Geological Survey's Mineral Commodity Surveys (I'm using them for my research right now - they're interesting).