I've never been in a relationship, that's also considering the fact that I don't really see the point. Sometimes I think that the relationships are too overly romantic so I want to make sure that it's taken more seriously.
Sunny and Aubrey's blossoming romance starts with the care they have for each other. They're only 12 though meaning it is taken with a grain of salt and treated a bit more platonically.
Hero and Mari is a different story since they are in a relationship. Even then, when you're in a relationship you do still act mainly the same towards the person but do have feelings of love and admiration. Some people are touchy feely while others can still remain distant at times. The love is still there, even if it isn't obvious.