How to let go!

So Pheobe and this guy that she is really digging are making out, and Pheobe gets this premonition that later on in the day he is going to get caugh tin the middle of a cross fire. She sees him getting shot and dying.....Gosh, how disturbing right? So se trys to get to him before it happens, an she ends up saving him. He is so shocked that je showed up in the time that he shower her with praise, thanking hr for saving his life.

Later on in the day she has another premonition that a demon is going to try to kill him at dinner and once again, she saves him. So he starts to think that she is some kind of good luck charm and that he is cursed so he asks her to spend the night with him. But as usual, Pheobe has a vision that he is going to fall off the balcony, an it happens and now its not cute to him anymore. He starting to freak out. He wants Pheobe to leave him be, because he thinks someething is after him.

Meanwhile, Cole visits Piper to tell him that if Pheobe doesn't let this guy die, that maybe she wil die trying to save him, trying to convince her that its his time to go. They tell Pheobe the situation and of coutse shes sad but whats right has to be!

So they go back in time and lets this guy get caught in the cross fire nd he dies..................The question is "If you knew the angel of death was after someone you knew, is it easier to let go"?How can you just let someone die if you know you can prevent it? How can you just let go like that?