So I recently met a guy, let's call him Guy. He's my age, pretty nice, and he's cute. He's my sister's friend, and I met with Guy during a carnival that I volunteered in. We met and talked, and it was fun. Afterwards, my sister asked if I liked him, to which I replied "yeah, I guess you could say that." She then said that Guy said the same thing about me. Guy's cute and all, but I don't think I should commit just yet, but I also don't want to lose my opportunity with him. What should I do?