For some reason I see this as about a relationship where the girl's completely submerged your personality in the other person, just lost herself entirely in him and in the relationship. He's a self-destructive loser, probably abusive, and he's pulling her down with him, but she's taking a look at herself. Wondering where she went to ("You were wild, where are you know?") and realizing that she has to leave, to let him self-destruct on his own. She comes to realize that "what [she's] seeking isn't here" and wishes for someone to either help him, or help her get out of there, but in the end she escapes on her own. She's driving down the highway away from him, feeling like she lost herself even though she just gained herself back, and she's just kind of marvelling: "I'm still alive, I'm still alive".
For some reason I see this as about a relationship where the girl's completely submerged your personality in the other person, just lost herself entirely in him and in the relationship. He's a self-destructive loser, probably abusive, and he's pulling her down with him, but she's taking a look at herself. Wondering where she went to ("You were wild, where are you know?") and realizing that she has to leave, to let him self-destruct on his own. She comes to realize that "what [she's] seeking isn't here" and wishes for someone to either help him, or help her get out of there, but in the end she escapes on her own. She's driving down the highway away from him, feeling like she lost herself even though she just gained herself back, and she's just kind of marvelling: "I'm still alive, I'm still alive".