Ann, yes, divers, bungee jumpers, and skydivers jump first, but jumping off of one's secure footing into the open air is followed by falling. That is to say, you still fall (even if you manipulate the position of your body), but to jump is to choose to fall (to choose to let gravity bring you back to earth. (As "gravity" often brings one back down to earth after one "falls in"--or "jumps into" love.)

Skydivers jump/dive into a "free fall" before opening the parachute.

Choosing to let yourself "fall in love" is a "leap of faith," isn't it?