How should one practice Dhamma in order to overcome loneliness? Loneliness is an obsession of a person when facing old age and death. How should one practice the teachings of the Supreme Buddha in order to overcome this obsession?
Samatha (tranquility) meditation using anapanasati (meditation with in &amp; out breathing) can be used as a method to overcome loneliness &amp; distress. 


  I tell you, monks, that this — the in-&amp;-out breath — is classed as a body among bodies, which is why the monk on that occasion remains
  focused on the body in &amp; of itself — ardent, alert &amp; mindful —
  putting aside wanting &amp; distress with reference to the world.
  
  Anapanasati Sutta


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  So if a monk should wish: 'May neither my body be fatigued nor my eyes and may my mind, through lack of clinging, be released from
  fermentations,' then he should attend carefully to this same
  concentration through mindfulness with in-&amp;-out breathing.
  
  If a monk should wish: 'May my memories &amp; resolves related to the household life be abandoned,' then he should attend carefully to this
  same concentration through mindfulness with in-&amp;-out breathing.
  
  Dipa Sutta