Be close/dear/near to somebody's heart - Idioms by The Free Dictionary
be close/dear/near to somebody's heart
be close to (one's) heart
To be personally important to or loved by one. The little girl who came to visit the elderly woman every weekend was very close to her heart.
be near to (one's) heart
To be personally important to or loved by one. That old dog is very near to my heart.
be close/dear/near to somebody’s ˈheart be a person or thing that somebody is very fond of, concerned about, interested in, etc: The campaign to keep our local hospital open is something that is very close to my heart.