I accidentally confessed to my girlfriend that I love her

I wasn't even planning to say that yet, my girlfriend and I (both 20) have been dating for 2 weeks and I was gonna wait at least a month before confessing my love. But now today we were just sitting together in our university's cafeteria, eating and talking, and I remember that we were talking about what's the most romantic thing we'd do for someone, and I said "One day, I'm gonna confess my love to my loved one and we'll go on a heart-pumping ride (roller coaster) and by the end of the day, we'll be officially in a relationship". And she said it sounded cool, and I said "I love you", but I was just joking!<br><br>Like, I swear, I wasn't planning to say that. But the moment I said that, she smiled, and I panicked, and I quickly said to her, "Oh wait! I was just joking". She laughed and said she knew I was. I knew at that moment I messed up, and I had to ask her, and I said "Do you know that it's true though?" Again, I knew I messed up by that point. She was just looking at me the whole time with a smile and said "I love you too!"<br><br>And I smiled back at her, and we kept eating and talking. When we were finishing our meal, I said "You know we aren't actually in a relationship, right?" And she said "Yeah, I wasn't expecting that". But when we were walking out of the cafeteria, she held my hand, and I didn't let go and we kept walking like that.<br><br>I was overwhelmed when we were walking, because I was so happy but now I'm just confused. Are we actually in a relationship because of what I said, or not? And what do I do now? Do I just wait and see how this goes, or do I talk to her about this? If so, what should I say?