A common symptom of “teenage fever” is simply indecisiveness, which leads to hesitation as a person is unsure whether romantic feelings are mutual, due to a lack of experience in the dating game.
John: " I'm not sure if sally likes me, we talk all the time and the vibes are perfect but I'm not sure if she feels the way I feel."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.