I think I'm leading someone on by accident
Did you think that it would happend?
No, I didn't. But I feel like if I had known all the facts, I wouldn't have done this to myself
While it is not your fault if somebody feels more than you, you should be more careful so that you are not giving any signals that would make them think you feel more. It will help so that nobody gets hurt.
I know what to do next time.
It's okay to make mistakes as long you learn something from them. Using those lessons in the future can prevent things like this from happening. I'm sure they'll understand what happen if you are genuine with them as well.