If you don't go to church or pray does that make you an atheist?

No an atheist is one who has claimed that ‘there is no god’. He/she has decided on that. An agnostic is one who may believe in a supernatural being who may be God, but doesn’t know enough to make a decision. A believer who doesn’t pray is ignoring God and will have to deal with the consequences. There are many believers who don’t go to church but who still maintain contact with other believers (like home groups or Messianic synagogues). There is no mention of a ‘church’ in the Bible anywhere. The idea of ‘church’ came hundreds of years after the last NT book was written. The word ‘ekklesia’ just means a gathering. In Greek it could even be a secular gathering. However, the Jewish disciples used that word to indicate a kehilah or assembly of Messianic believers (both Jew and Gentile in the same group).