Help with a sentence? :)

Hello! I am trying very hard to write a cute little sentence or two to a dear friend of mine, and I was wondering if someone could help me out, as it's causing me some big troubles! My version is probably a big mess lol.

I am trying to say in English:
If I was able to say only one thing to you, I would say that I just want you to be happy, even if you are not able to find happiness with me, because I love you.

What I have in Spanish:
Si yo puedo decir sólo una cosa a tú, diría que yo sólo quiero ver que tú estás feliz, aun cuando no puedes hallar la felicidad conmigo, porque te amo.

Thinks I know I did wrong are in bold... and there is probably other things I translated wrong in there unbolded too :p

:D THANKS FOR ALL AND ANY HELP! :D

Si pudiera decir una sola cosa, diría que solo quiero que seas feliz, aún cuando no halles la felicidad conmigo, porque te amo.
It´s not too bad what you wrote, the verbs are not correct, but the sentence is meaningful. Don´t give up.