Skinny Love:
Two people that are very in love with each other, or are crushing big time on the other; but are far to embarrassed to express their feelings. The relationship is 'skinny' because they have yet to come out and explain their true feelings. 

When two people love each other but are too shy to admit it but they show it anyway.

-Urban Dictionary

Skinny Love - Birdy

Come on skinny love just last the year,

And I told you to be patient, And I told you to be fine,
And I told you to be balanced, And I told you to be kind,
And in the morning I'll be with you, But it will be a different kind,
'Cause I'll be holding all the tickets, And you'll be owning all the fines.

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