"I had not felt so well in years."
Translation:No me había sentido tan bien en años.
En años - i was under the impression that if it was duration "por" is used instead of "en". En is used when talking about a deadline. Does someone have an explanation for this. Thank you
to feel = sentir
to feel good, well = sentirse bien
I feel good = yo me siento bien
You feel good = tú te sientes bien