How do i prove i love him?

ok my bf lives 3 hours away and neither of us can drive so we don't see eachother. i told him to prove to me that he loved me and he said i'll prove i love oyu if you prove you love me. HOW DO I PROVE I LOVE HIM. i mean stuff besides letters and poems and songs and pictures. i need someting creative and i need help! if you can tink of anything at all tell me