CC Antya 17.51

kim iha kṛṇumaḥ kasya brūmaḥ kṛtaṁ kṛtam āśayā
kathayata kathām anyāṁ dhanyām aho hṛdaye śayaḥ
madhura-madhura-smerākāre mano-nayanotsave
kṛpaṇa-kṛpaṇā kṛṣṇe tṛṣṇā ciraṁ bata lambate
Synonyms: 
kim — what; iha — here; kṛṇumaḥ — shall I do; kasya — to whom; brūmaḥ — shall I speak; kṛtam — what is done; kṛtam — done; āśayā — in the hope; kathayata — please speak; kathām — words; anyām — other; dhanyām — auspicious; aho — alas; hṛdaye — within My heart; śayaḥ — lying; madhura-madhura — sweeter than sweetness; smera — smiling; ākāre — whose form; manaḥ-nayana — to the mind and eyes; utsave — who gives pleasure; kṛpaṇa-kṛpaṇā — the best of misers; kṛṣṇe — for Kṛṣṇa; tṛṣṇā — thirst; ciram — at every moment; bata — alas; lambate — is increasing.
Translation: 
Śrī Caitanya Mahāprabhu said, “ ‘Alas, what shall I do? To whom shall I speak? Let whatever I have done in hopes of meeting Kṛṣṇa be finished now. Please say something auspicious, but do not speak about Kṛṣṇa. Alas, Kṛṣṇa is lying within My heart like Cupid; therefore how can I possibly give up talking of Him? I cannot forget Kṛṣṇa, whose smile is sweeter than sweetness itself and who gives pleasure to My mind and eyes. Alas, My great thirst for Kṛṣṇa is increasing moment by moment!’
Purport: 

This statement by Śrīmatī Rādhārāṇī is quoted from the Kṛṣṇa-karṇāmṛta (42).