The song is actually in E but I figured it out in D so that I can actually sing it on a Sunday Morning. So if you want the original key just raise it one whole step. Also, if you don't know the easy way to play Bm7, it's just just second fret on the A, G and high e strings with the rest open. Oh, I'm also really bad at deciphering lyrics so I may be wrong about some of them. I couldn't find the lyrics online anywhere so this is as good as my ear can figure out. You Have My Heart - Ascend Th (guitaretab.com)