Bit obscure, but Gorecki by Lamb. I'm not the soppy type but it gets me every time! It's got enough of a trip hoppy beat to stop it sounding sentimental, but the lyrics are genius:
'If i should die this very moment, i wouldn't fear;
for i've never known completeness, like being here
wrapped in the warmth of you, loving every breath of you
still my heart this moment, or it might burst
could we stay right here, 'til the end of time, 'til the earth stops turning
wanna love you 'til the seas run dry, i've found the one i've waited for
all this time i've loved you, and never known your face
all this time i've missed you, and searched this human race
here is true peace, here my heart knows calm
safe in your soul, bathed in your sighs'