The poem
O, were I loved as I desire to be! What is there in the great sphere of the earth, Or range of evil between death and birth, That I should fear, - if I were loved by thee! All the inner, all the outer world of pain, Clear love would pierce and cleave, if thou wert mine; As I have heard that somewhere in the main Fresh-water springs come up through bitter brine. 'I were joy, not fear, clasped hand in hand with thee, To wait for death - mute - careless of all ills, Apart upon a mountain, though the surge Of some new deluge from a thousand hills Flung leagues of roaring foam into the gorge Below us, as far on as eye could see.
Meaning
i think maybe what Tennyson is trying to say is that if he were loved as much as he would like to be, what would be the point in anything else?