"h-alainn" should be "hálainn"
"Tá tú go hálainn" means "You're beautiful"
"cronaím thú" should be "cronaím uain thú"
"cronaím uaim thú" means "I miss you"
"go mbíodh biseach ort gan mhoill" means "that you used to be well soon"
It should probably be "Go raibh biseach ort gan mhoill" which means "May you be well soon"