To learn how to say "I love my nephew" in Spanish it is easiest to first understand the translations for each word that make up this sentence in Spanish.
Word breakdowns and pronounciation
So firstly we have to cover the "I love" part. This is written as "amo a" in Spanish, and is a masculine noun.
Secondly, "my nephew", which translated into Spanish is "mi sobrino".
Put together, this sentence would read:
"Amo a mi sobrino"
If you break this down phonetically it makes it easier to pronounce so try the following:
Ah-mo-ah-me (I love my) followed by so-bree-no (nephew)
How to tell anyone you love them in Spanish
Alternative way to say I love my nephew
Another acceptable way to say this is spanish would be "Me encanta mi sobrino".
