You have spelled it correctly, heartfelt, which refers to deep sincerity of feelings.
The term implying emotional sincerity is correctly spelled (heartfelt).
The Heartfelt was created in 2001-09.
"Heartfelt" in English is sincero in Italian.
I want to express my heartfelt gratitude for your help and generosity during this difficult time.
Heartfelt - 2008 was released on: USA: 21 May 2008
The cast of Heartfelt - 2008 includes: Julissa Eckenrode as The Girl Jo Eric Mercado as The Boy
heart-felt
It doesn't have a tense as it is an adjective.
Sympathetic?
affectionate
There are many heartfelt quotes and the best one is a matter of taste. Some popular ones are: "They do not love that do not show their love", and "Love is friendship set to music.
A smile and a heartfelt "Thank you".