My finance has been acting weird lately and when I asked her what was wrong she replied that "I Love you, but I don't know if it is enough." What it boils down to is that she wants to break the entire relationship off. I love this woman with my entire being and want nothing more than to be with her for the rest of my life. I don't know if she is worried about the wedding or what. If anyone has any input on what she may be felling or experiencing and what I can do to comfort her it would be much appreciated.

here are my thoughts, take them with a grain of salt.  I am very sorry that you are faced with this situation.  If her actions and feeling are coming from the stress of the wedding then that isn't a good sign.  That may be a sign that when she is faced with stress all she wants to do is give up.  Planning a wedding is hard but being married is much harder and you want someone who isn't going to buckle under stress.  You want someone who is COMMITTED, its ok to be scared and have doubts but if you really love the person and you have what it takes then you will do anything in your power to not let your loved one know the doubts you are having.  You want some one who can firmly say , "I LOVE YOU!! AND IT IS ENOUGH!!!"  Also, if you are considering trying to convince her to stay in it that isn't a good idea.  She needs to make the decision on her own without any pressure, because you don't want her ten years down the road to say, "you forced me into this marriage".  I know its hard but there will be someone out there who will love you and have the same amount of commitment as you do.  GOOD LUCK!!