If you want to keep going with the life gain focus, you might want to try something like this
you don't need the pricier cards like Elspeth - the core of the deck is the two "Soul Wardens" and the Pridemates/Serr Ascendent. It's pretty easy to get a 5/5 or so Pridemate or 30 life for the Ascendent. If you are using older cards you can replace all of the Paths with Swords to Plowshares and if your boyfriend plays black and red then adding in Auriok Champion would probably just let you win all of the time and fits the life gain theme. I would say that picking up Brave the Elements would be a good idea for any mono-white deck as it's really useful.
If you want to stick to the aura theme, then go up to 4 of the Spirit Dancer and all 4 Flickering Ward. I'd cut back on at least one Daybreak Coronet as you're just asking to get that creature killed and then you are down a bunch of cards with nothing to show for it. probably try to use creatures with Protection abilities like White Knight or Paladin En-Vec so that it's harder for the creature to die in response to casting an Aura. Or creatures that harder to kill like Knight of the Holy Nimbus
Hope this was hopeful!