That depends on what aspect of love you want to focus on. Love features so often in the Bible that it is impossible to say that a particular verse, or even a particular handful of verses are 'better' than all the others.
In the King James version
- the word - love - appears 310 times
- the word - love's - appears once
- the word - loved - appears 98 times
- the word - lovedst - appears twice
- the word - lovely - appears 4 times
- the word - lover - appears 4 times
- the word - lovers - appears 23 times
- the word - loves - appears twice
- the word - lovest - appears 12 times
- the word - loveth - appears 65 times
- the word - loving - appears 3 times
- the word - lovingkindness - appears 26 times
- the word - lovingkindnesses - appears 4 times
- the word - beloved - appears 113 times
- the word - beloved's - appears twice
the word - wellbeloved - appears 4 times