CC Madhya 19.178
rāga, anurāga, bhāva, mahābhāva haya
“The basic aspects of prema, when gradually increasing to different states, are affection, abhorrence, love, attachment, further attachment, ecstasy and great ecstasy.
In the Bhakti-rasāmṛta-sindhu, (3.2.84) sneha (affection) is described as follows:
kṣaṇikasyāpi neha syād viśleṣasya sahiṣṇutā
“That aspect of prema in which the melting of the heart for the lover is concentrated is called sneha, or affection. The symptom of such affection is that the lover cannot for a moment remain without the association of the beloved.” A description of māna can be found in Madhya-līlā (chapter two, verse 66). Similarly, a description of praṇaya is also there. As far as rāga is concerned, the Bhakti-rasāmṛta-sindhu (3.2.87) says:
tat-sambandha-lave ’py atra prītiḥ prāṇa-vyayair api
“That stage at which affection for the beloved converts unhappiness into happiness is called rāga, or attachment. When one has such attachment for Kṛṣṇa, he can give up his own life to satisfy his beloved Kṛṣṇa.” Anurāga, bhāva and mahābhāva are described in the Sixth chapter of the Madhya-līlā, verse 13. The purport to that verse explains adhirūḍha-mahābhāva.