Philia which they saw as a deep but usually non-sexual intimacy between close friends and family members or as a deep bond forged by soldiers as they fought alongside each other in battle.
Ludus describes a more playful affection found in fooling around or flirting.
Pragma is the mature love that develops over a long period of time between long-term couples and involves actively practising goodwill, commitment, compromise and understanding.
Agape is a more generalised love, it’s not about exclusivity but about love for all of humanity.
Philautia is self love, which isn’t as selfish as it sounds. As Aristotle discovered and as any psychotherapist will tell you, in order to care for others you need to be able to care about yourself. Last, and probably least even though it causes the most trouble, eros is about sexual passion and desire. Unless it morphs into philia and/or pragma, eros will burn itself out.
- What is love? Five theories on the greatest emotion of all (guardian.co.uk)