Yes, the poem is long. It is over 131 verses long, and fills a Word document to over 100 pages (depending on the font).
Tennyson's poem was labored on and more material added over a period of 17 years after Arthur Hallam died in 1833. The poem was not completed until it was published in 1850, when Tennyson was named poet laureate of England.
To save some time looking, the phrase in question actually appears twice in the poem:
~From Verse 27:
I hold it true, whate'er befall;
I feel it, when I sorrow most;
'Tis better to have loved and lost
Than never to have loved at all.
~And From Verse 85:
This truth came borne with bier and pall,
I felt it, when I sorrow'd most,
'Tis better to have loved and lost,
Than never to have loved at all ?
http://www.geocities.com/~spanoudi/poem ... yson01.htm