“Rwy’n hoffi chi. Dych chi eisiau mynd i’r caffi gyda mi am baned o goffi?”

=

“I like you. Do you want to go to the café with me to have a cup of coffee?”

I’m still learning Welsh, so this might contain mistakes, but it’s better than saying you don’t understand her… For future reference, you know.

Edit: Meant to reply to the comment below me.