I think it is love is blind
He was desperate to find his son :)
The final e is usually dropped before a suffix beginning with a vowel:
debate. debatable.
desire. desirable.
dine. dining.
excite. excitable.
like. likable.
love. lovable.
make. makable.
move. movable.
One that is general, and does not specify which specific aspect you are looking in to