I think you asked the question, and you kind of answered it yourself.
Those moments of strong feelings for someone does exist making you spill out so much. Well it does not mean it's fake or exagerated, it's actually the way you feel at that point.
Where we go wrong about love is when we think it is a feeling. It can trigger a feeling but it is not just a feeling it is more than that. Feelings can not be depended on because they rise and fall based on one thing or the other. Nice subject.