If I had to have an aesthetically descriptive name like this, I'd prefer it to be a noun like Beauty or Loveliness. And I feel I would be more interested to meet someone named Loveliness than someone named Lovely.
Love by itself is charting in the US. I think it could be awkward as a first name, but it's not as awkward as
Precious seems to me because it's slightly more likely to strike me as partially an ideal/virtue name rather than exclusively as an endearment. So...I prefer
Love by itself to Lovely but wouldn't prefer
Love to Lovejoy or Loveday.