How do you write and say in Gaelic

You've captured my heart

Thank you for your assistance.

Tá mo chroí i do sheilbh agat.

Taw mo CHree ih do Heh-luhv ah-guht (CH like BaCH, loCH)

You have my heart in your possession.

If you drop the "agat" at the end, then it would just mean "My heart is in your possession."

Needless to say, there are scores of other ways to express this sentiment.