enshrine in heart
enshrine (someone or something) in (one's) heart
To retain fondly, as of a memory. While I'm heartbroken that grandma is gone, at least I've enshrined all of my wonderful memories with her in my heart.
enshrine someone in one's heartand enshrine someone's memory in one's heart
Fig. to keep the memory of someone in a special place in one's heart or mind. Bob enshrined Jill's memory in his heart.