Corrections in red.  Stylistic suggestions in blue

Friends

Yesterday I had a really great time with my friend Karina.
She has been living in the USA for two years.
We spent all day together, and spoke a lot about life in Russia and the USA.
We spoke about the political situation, the opinions of ordinary people, what has happened in American churches, liberalism, and the silence about what the Bible says truthfully.
We walked around our beautiful city, just shared our thoughts and feelings with each other, and just laughed. We remembered funny stories from ours lives.

The people around you can expand/extend your world.  Good people who are different from you can make your world broader/wider and richer.

Friends

Yesterday I had really great time with my friend - Karina.
She been living two years in USA.
We spent all day together, and spoke a lot about life in Russia and USA.
We spoke about the political situation and opinions from simple minded people. What happened in American churches, liberalism, silence and about what bible says truthfully.
We walked around our beautiful city and just shared each other feelings, thoughts and just laughed. We remembered funny story from ours lives.

People around you can extend your world. Different and good people enrich your world with knowledge or a different point of view.