So, we recently got in a relationship and this is my first. I met her online and we haven’t really see each other’s faces, but I know where she’s from, her age, etc. She starts asking these random questions since yesterday, I don’t know how to answer her, so I just make jokes and laugh it off. Today, she asked me “What if I’m a 60 years old”. I answered, “I know you’re not”. She asked back, “How would you know?”. And that’s where it hits me. I don’t know, but I’m totally sure she is not. So, I stall, but she kept demanding for the answer. I freaked out. And then, she was just like, “Nevermind, just forgot about it. If you can’t be serious, then whatever”. I apologized to her, and she accepted it. But I know she’s still mad at me. What do I do? How do I be serious?