Buddhists are quick to highlight the importance Buddha placed on the concept of metta, loving-kindness, friendliness, benevolence,amity, friendship, good will, kindness, close mental union (on same mental wavelength), and active interest in others, in his followers.
Metta is seen as the natural result of a flowering Buddhist practice. Wikipedia has a statement that is worth quoting in full that “The cultivation of loving-kindness (mettā bhāvanā) is a popular form of meditation in Buddhism. In the Theravadin Buddhist tradition, this practice begins with the meditator cultivating loving-kindness towards themselves, then one’s loved ones, friends, teachers, strangers, enemies, and finally towards all sentient beings. In the Tibetan Buddhist tradition, this practice is associated with tonglen (cf.), whereby one breathes out (“sends”) happiness and breathes in (“receives”) suffering. Tibetan Buddhists also practice contemplation of the Brahmavihāras, also called the four immeasurables, which is sometimes called ‘compassion meditation’”