Friends for life?

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Across
  1. 1. your opponent in sport or competition
  2. 3. a person you hate, you`re in very bad relationships
  3. 6. person you work with
  4. 8. person who is a part of your family
Down
  1. 2. person you know, but you`re not friends
  2. 4. person you don`t know at all
  3. 5. person you share an apartment with
  4. 7. your brother/sister