In Vishnu Sahasranamam there are two beautiful namas - lakshmIh and lakshmIvAn - meaning Vishnu is Lakshmi.
They are only One.
Wherever Krishna is, there will be Lakshmi Devi also. No doubt.
As the Rasa Leela was about to begin, Manmatha (Cupid) appeared before Krishna. When Krishna asked why he was there, Manmatha replied, "I have conquered the gods—including Brahma and Indra. If I conquer You as well, I shall be truly invincible." Krishna pointed out, "You did not conquer Shiva, did you?" Manmatha explained that it was impossible because Shiva was deep in penance at the time. When Krishna noted that he had failed to touch Rama too, Manmatha reasoned that Rama was devoted to a single wife (Eka-patni-vrata). When asked what gave him the courage and idea to attempt this now, Manmatha pointed to the Gopis surrounding Krishna and admitted that the sight had tempted him. Krishna simply said, "Very well, you may try."
Standing behind a tree, Manmatha prepared to shoot an arrow at Krishna as the Rasa Leela commenced, but he hesitated, seeing both men and women present. As he wondered whom to target, a brilliant beam of light appeared. Within it, Goddess Lalita revealed Herself, bearing a noose, a goad, a sugarcane bow, and floral arrows. Manmatha was overwhelmed and lost his composure upon seeing the Goddess surrounded by other divine figures like Anangasena, Anangamalini, Madayanti, and Bala. He dropped his bow and arrows and prostrated at the Goddess's feet. That Goddess was none other than Radha Devi, the presiding deity of the Rasa Mandala. What role was there for Manmatha in such a realm?
The sages and the mantras of the Upanishads—who had performed penance over countless lifetimes, awaiting liberation—had taken birth as the Gopis of Gokulam. Krishna bestowed liberation upon all of them. Goddess Radha was the facilitator of such a magnificent event.
Goddess is only one in different forms.
Subhamastu