This is not a direct answer per se, but I hope that you can find an answer within it. Acknowledging the absence of a dear one and remembering their good qualities are different things from dukka. It would be a good meditation to see at which point this acknowledgment & remembrance turns to dukka, and investigate the causes - you may find that this dukka is due to remorse, broken expectations, etc. Yet for one who has nothing to feel remorseful, has no expectations, the absence is felt, but there arises no dukka.
Once the Blessed One was dwelling in the Vajji country, at Ukkacela on
the bank of the river Ganges, not long after Sariputta and Maha
Moggallana had passed away. And at that time the Blessed One was
seated in the open, surrounded by company of monks.
The Blessed One surveyed the silent gathering of monks, and then spoke
to them, saying:
"This assembly, O bhikkhus, appears empty to me, now that Sariputta
and Maha Moggallana have passed away. Not empty, for me, is an
assembly, nor need I have concern for a place where Sariputta and Maha
"Those who in the past have been Holy Ones. Fully enlightened Ones,
those Blessed Ones, too, had such excellent pairs of disciples as I
had in Sariputta and Maha Moggallana. Those who in the future will be
Holy Ones, fully Enlightened Ones, those Blessed Ones too will have
such excellent pairs of disciples as I had in Sariputta and Maha
"Marvelous it is, most wonderful it is, bhikkhus, concerning those
disciples, that they will act in accordance with the Master's
Dispensation, will act in according to his advice; that they will be
dear to the four Assemblies, will be loved, respected and honored by
them. Marvelous it is, most wonderful it is, bhikkhus, concerning the
Perfect Ones, that when such a pair of disciples has passed away there
is no grief, no lamentation on the part of the Perfect One.
For of that which is born, come to being, put together, and so is
subject to dissolution, how should it be said that it should not
depart? That indeed, is not possible."
"Therefore, bhikkhus, be ye an island unto yourselves, a refuge unto
yourselves, seeking no external refuge; with the Teaching as your
island, the Teaching your refuge, seeking no other refuge."