Person 3, I think you are a male if I remember correctly from previous posts, but this can apply to all.
BEWARE of people who are:
A. TOO nice (always something suspicious, fake)
B. of people who talk too much about past relationships or too little (either they are obsessed or have something to hide)
C. if a girl ever calls you by her old boyfriend's name, let her go (maybe one slip, two she's history)
D. Don't let a girl continue to lead you on after you've broken up. I had a terrible experience with this, and learned pretty much every trick in the book. People who are more sure of themselves and willing to do the right thing under appropriate circumstances, are more true.
That's all I've learned. Actually, don't listen to me because I'm a relationship retard.
But, "every time a window shuts, another one opens."