Be Careful, It's My Heart lyrics

Sweetheart of mine I sent you a valentine Sweetheart of mine It's more than a valentine Be careful it's my heart It's not my watch you're holding It's my heart It's not the note I sent you That you quickly burned It's not the book I lent you That you never returned Remember it's my heart The heart with which so willingly I part It's yours to take, to keep or break But please before you start Be careful, be careful Be careful it's my heart