Translation:It felt wrong to stand with her heart in my hand.
For føle you can do that decision with the following hints:
if you have a person as the subject who's doing the feeling, you use the active form
Han følte vinden. - He felt the wind.
if you have something as the subject that is creating a feeling, you use the passive form
Vinden føltes kold. - The wind felt cold.
bonus: if you want to express how someone feels, you use føle sig
Jeg følte mig skyldig. - I felt guilty.
Ejnar, English doesn't make a distinction between the act of "feeling" that people do and the act of "feeling" that objects do when you're describing how they feel. So the sentences
- He felt the sun.
- The sun felt warm.
use the same verb form in English, but not in Danish:
- Han følte solen.
- Solen føltes varm.