This thing called love...

I think that the couple feels that way because they think that they have met the right person to lose their hearts, they now feel like being next to the other person as long as possible because they love the way the other is, but they also are uncertain because it has happened so fast so what they feel isn't clear.
(Answer for question #2)

Yes, I agree, because we all have feelings even if we don't show them but I don't think that there could be a couple in love without being romantic at least once because we all need that sometimes.
(Answer for question #3)