My convo with my crush I will say I was thinking of taking Spanish next year. After he tells me he's taking Spanish and he said good idea. he got back fast. What does it mean?

His quick response suggests that he’s interested in the topic and possibly eager to engage in conversation with you. By expressing approval of your idea, he might be trying to show support and create a connection over a shared interest. It could indicate that he values your opinion and wants to find common ground, which is a positive sign in your interactions.