How to prove you love him more?

My boyfriend and i were having an i love you more fight and then he said prove it, so now he's going to prove to me he loves me more and i have to prove to him i do. He's really creative when it comes to cute things, like when he asked me out he spelled it out on a scrabble board so when we went to play it i saw it. Any cute creative ideas to prove i love him more??