No because there is no clear evidence of him showing compassion for her, only freindship.
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The same reason luigi doesn't tell rosalina that the npc luigi found it Mario just wants the credit for collecting it
prinsess rosalina prinsess dasiy prinsess peach
yes, he is their dad and rosalina is their mom and waluigi is there uncle and Mario and luigi are twin brothers and Mario's best friend is yosh and he is also married to peach also luigi is married to daisy
I don't think that any of the girl characters are in love with Waluigi, but who knows?
no rosalina does not like waluigi she likes luma and polari!