Radiating and resonating in love is a natural state that does not require or depend on anyone or anything in particular. It can spring forth with great power and immensity. It does not require belief in a god or god-story. Rather, it would seem that the idea of a god was enhanced into taking credit for that natural state!
As if you need a god to experience it -- which you don't! As if a god is the source of it -- which it's not! Human beings may and do attribute such love to all kinds of things... but it's free and natural.
On this Earth stage of noisy productions, such love isn't typically part of the script. It may be easier to access when alone -- which is maybe why sages go off into caves to better connect with that natural vibration. Sufi teachings say that any man can go off to live in a cave to become enlightened, but the true master is the one who can practice it in the middle of a crowded street.
I didn't experience it in my prior relationships to the degree that I felt capable of doing myself. Like you, while single, I did experience it very profoundly! That's when I became aware that everything is perfect and that it doesn't need to be any particular way. Whatever this is... wherever we are... it's a dance. And I think that realization took the pressure off (for me). The potential is wide open and ever-present.
I've now been living in a relationship for a year with a man who is very loving, kind, and open -- and we both wonder about this dream that we've come together in. It appears that we are practicing greater potential together and learning how to become the best of ourselves, while navigating the wild world of current civilization. We have each had moments of extraordinary love arise for each other at varying times (more than just 'relationship love') -- and it's very sweet to recognize and acknowledge that together. It demonstrates (again) how natural and accessible such love can be -- we just have to move beyond the noise of the world and the noise in our head... to see what we are naturally part of.
I think feeling love on your own is essential. Then to meet another, who is doing that too, can begin an interesting journey of both allowing and supporting each other to be and experience ever-unfolding potential in this world we live in (if both are committed to that). Travelling life's road together and feeling the comfort, support, and empowerment from which to spring forth and manifest one's own 'artwork' is a gift. Of course it requires responsibility and honesty and loving patience on all sides to navigate individual and collective fields and forests. And, surprisingly, it has occurred for me with someone I wouldn't have expected: a yoga-practicing Republican who supported Trump!