Como dizer "Você apareceu na minha vida" em inglês

to appear

Aparecer
He appeared calm and relaxed.
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Aparecer, surgir
She suddenly appeared in the doorway.
→ Opposite disappear
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To perform in a movie, play, etc.
She appears briefly in the new James Bond movie.
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To start to exist or become available
Laptop computers first appeared in the 1980s.

to show up
To arrive somewhere in order to join a group of people, especially late or unexpectedly:

I invited him for eight o'clock, but he didn't show up until 9.30.
We were expecting 30 people to come, but half of them never showed up.
How many people showed up to the meeting?
He was rude and unhelpful and always showed up late to work.

Resposta da sua pergunta : You appeared/showed up in my life.

I hope it helps!
Regards

Sandra, one possibility is: "You came into my life."

Cheers

You came into my life.
You have come into my life.
>> Você apareceu / surgiu na minha vida.

"Thank you for coming into my life and giving me joy. Thank you for loving me and receiving my love in return. Thank you for the memories I will cherish forever. But most of all, thank you for showing me that there will come a time when I can eventually let you go."

"Obrigado por aparecer em minha vida e me proporcionar alegria. Obrigado por me amar e receber o meu amor em troca. Obrigado pelas lembranças que eu vou guardar com carinho para sempre, mas acima de tudo, obrigado por me mostrar que chegará o tempo no qual eventualmente eu poderei deixar você partir."

REFERENCE: SPARKS, Nicholas. Message in a Bottle. 1998.