When did I fall?

I didn't mean to. I really didn't ever expect to either.
But here I am...standing with a whole left where my heart used to be. I think I want it back. I'm scared, really scared. I didn't expect to fall for him. Weirdest part is that we're like the same person...only we're not. I love everything about him. Even the cockiness of his personality. The only thing is that I'm not sure that either of us is ready for this right now in our lives. How do u fall in love with someone and know perfectly well you shouldn't be? I'm so confused. He's asking me to wait for him. How long is that though? how long does he need to continue his lifestyle that I want out? I need to make some really tough decisions. I need to decide if its worth staying for. What if he does the same thing to me that he's done to her. What if his commitment is never really a commitment? Gosh...i wish love wasn't so scary. I need wisdom. I need to stop giving myself to him until I'm sure he's the one I need to be giving it to. WIsh i could fast foward time. ::sigh::