When you fall in love you never fall out of it. your stuck- in metaphorical mud, or free-fall. the love only stops when you pop the (metaphorical) parachute and you land gently. you are then ready to move on.
problems arise when your chute [can I drop the metaphor yet?] doesn't open properly and you hit the ground hard, if your smart you will turn and leave. if your not you will ride the Love-train again.
*maybe Love-PLANE would be more fitting...?