Possible Clues:

• Nonromantic, as a friendship
• Following old philosophy, sorted out optical illusion finally
• Friendly drink after climbing mountain
• Note -- first to scale mountain's rising first -- it's close but not that close
• Non-sexual
• Non-physical complaint head of medicine dismissed wrongly
• Quiet learner needs a medicine, being without sign of passion
• Nonromantic, as some relationships
• Pal composed note, just like friends
• Purely spiritual wretched pal needs a pick-me-up