A fork of Rural Dictionary
When you put your head over your heels in front of someone you're rear is exposed, leaving you completely vulnerable. - When you are "head over heels in Love" it means that your love is based on trust for that person, resulting in that head over heels feeling. - a mixed feeling of vulnerability, trust and Love. Often combined with "butterflies in your stomach" which come on strong in the beginning, but never leave.
I am so head over heels in Love with you, my world will never be the same.