Its such pity you cant go tonthe dance with your friends. Which definition of pity matches it use in the sentence above.

A sympathetic sorrow for one suffering or distressed?

B a capacity to feel another

C something to be regretted

D feeling of disgrace or shame

The word pity in this sentence means something to be regretted which is letter c. To feel regret is nearly just like to feel a deep disgrace. To feel pity is to feel understanding for somebody else. You can also pity yourself too. Synonyms for pity also include: compassion, misfortune, or sad thing.