The song is slow, a love song, piano, maybe guitar. It's very gentle. It's English, probably an American band. The singer is a man, and has a nice tone, almost sounds like he's talking. It's in 4/4 time. The beginning is just a list of gerunds (words ending in "ing"). Each word takes about 2 beats. So it sounds like (and these are probably not the actual words), "Running *beat* and loving *beat* wishing *beat, beat, beat, beat* and touching *beat, beat, beat (and then it ends with) "and waaaaaaitinnnng... and loving". "wai" takes four beats, "ting" takes four beats. On the third beat in "waiting", the note goes up and the volume does too, and the chord changes, then it all goes back down on "loving" (again, maybe not the right word). The song never gets too energetic, and I think the tempo is constant. I doubt drums were used.
Thank you so much for reading this. This is one of the most beautiful songs I've heard and it would mean so much to me if I could listen to it again.