Ellie Goulding - Love Me Like You Do (Official Video)

In the first verse, the narrator realizes that she’s falling crazily infatuated (or, in love perhaps) with the addressee. He has become her everything despite knowing that being with him brings about some “pain”. However, he also is the “cure”. She’s never been exposed to such an intense feeling before so she didn’t expect that “it could mean so much”.