I would write it this way:
Je t'aime.
Papa.
I love you father = Je t'aime, (mon) père
love in french is "amour".
To say "I love him/her" in French, you say: "Je l'aime"
father is translated père in French.
My father is 'mon père' in French.
to love is translated 'aimer' in French
in love in French is "amoureux de".
Vaterliebe du=Father love you
I love it is "j'aime / j'aime ça" in French.
"and her love" is ".. et son amour" in French.
aimer as a verb, amour as a noun are the French words for Love
Love (noun) is "amour" in French. To love (verb) is "aimer".