Five Things Nobody Knows About Neville Longbottom (Not even Luna Lovegood)
He once tried to teach himself to play acoustic guitar
He successfully taught himself to tango
Once, he almost fell out of the window of the astronomy tower, but he caught himself.
He has a two year old Christmas present, one her never gave to its proper recipient, sitting in the bottom of his school trunk.
All of the above were misguided attempts to tell Luna that he loves her.