Van Morrison - 'I'll be Your Lover, Too' - possibly the most fucking aching beautiful sentiments in a single song.. Good luck dudem follow your big soppy heart!
Aw wow, just saw now that you're proposing to her, that's fab man, congrats The Van Morrison song might still be a good one for a wedding or something! On a side note - I play professionally in a string quartet for weddings, functions, what have ya - I've done 600 or 700 gigs over the past ten years, so if you want any advice on choosing music or whatever, feel free to ask, I'd be more than happy to help you out. Good luck man
many songs by pj harvey, most of it is seriously beautiful
although their are more on the "she doesn't love me back" side
by now you probably know the answer
but preventively, a song like those could show the deepness of your love