You Give Me Something

The girl is completely in love with him. He is attracted to her and enjoys her affection:

You already waited up for hours Just to spend a little time alone with me

but he is not really in love. He realises that if he was really in love, he would automatically want to do things to show the girl his love:

And I can say I've never bought you flowers

And the words I could never say Gonna come out anyway

The girl is moving things forward with the non-physical parts of the relationship (maybe going on vacation or moving in together). The guy feels like he ought to tell her that he loves her less than she loves him but he knows that it could break the girl's heart. It's easier to just go with the flow:

I was meant to tread the water Now I've gotten in too deep

Another piece backs away

He is confused by his feelings and can't work out whether or not his feelings are love or just lust and love of being loved. She is probably his first girlfriend, so he decides to just keep going with the relationship as it is a novel experience in the hope that they soon become equally in love with each other:

But I'm willing to give it a try

But what are his muddled thoughts about in the following lines: ?

I can't work out what they mean I never thought that I'd love someone That was someone else's dream

I think he had never had success with girls and had pretty much written himself off and expected never to find himself in a relationship. He likes the feeling now but it has taken him by surprise and shocks him. He just needs some time because:

'Cause someday I might know my heart

My main thing I can't work out is: What is the something in "Please give me something"?

Perhaps he is asking simply for some time to grow up and listen to his heart.

Anyway, a beautiful song, but a sad one.