YOU SAID:

i have a crush on the neighbour's grandpa

INTO JAPANESE

私は隣人のおじいちゃんに片思いしています

BACK INTO ENGLISH

I am unsying of my neighbor's grandpa.

INTO JAPANESE

私は隣人のおじいちゃんを気に入らない。

BACK INTO ENGLISH

I don't like my neighbor's grandpa.

INTO JAPANESE

私は隣人のおじいちゃんが好きではありません。

BACK INTO ENGLISH

I don't like my neighbor's grandpa.