Texting crush

Hi! So i saw this girl on dating app and iam interested to her. Too bad she hasn’t active for a while in the app but i found her ig. Idk what to do so i bought her cake, she sells cake and we just chat as a seller and buyer. But now the convo is ended. Idk what to ask since idk for sure if she likes girls too. But i have this feeling from how she dressed. What to do? What should i talk about?