Formal:
* Ikaw ang aking inspirasyon. (This is the most direct translation and is suitable for formal situations.)
Informal:
* Ikaw ang nagbibigay ng inspirasyon sa akin. (This translates to "You are the one who inspires me" and is more conversational.)
* Inspirasyon kita. (This is a more casual way of saying it, meaning "You are my inspiration.")
More poetic:
* Ikaw ang liwanag na nag-iilaw sa aking daan. (This means "You are the light that illuminates my path" and conveys a strong sense of admiration.)
The best way to choose the right phrase depends on who you are talking to and the context of the conversation.