She's too afraid to open herself up.
Before, the other person knew only what she let them know about herself. But, somehow, they have gotten to know her more than she felt safe with.
She loves the person, but is too scared that it's real and is too scared to let herself be loved.
She just wants to get back in the person's head, meaning the person had not figured her out yet, and still wondered about everything she kept hidden. She wants to be mysterious.
And she "strays when she is scared" because she doesn't want to get too close this one person. When she's scared she plays hard to get.
She's too afraid to open herself up. Before, the other person knew only what she let them know about herself. But, somehow, they have gotten to know her more than she felt safe with. She loves the person, but is too scared that it's real and is too scared to let herself be loved.
She just wants to get back in the person's head, meaning the person had not figured her out yet, and still wondered about everything she kept hidden. She wants to be mysterious.
And she "strays when she is scared" because she doesn't want to get too close this one person. When she's scared she plays hard to get.