Well. talking about it is a good start! .. I know how incrediable hurt and somewhat betrayed you must feel. She seems to be confused too from what you describe. I wonder why, why she would tell you that after college he intends to ask for her hand? I mean ... isnt that like a desperate move to you? Look at it in the big picture.. she obviously has feelings for you ... she may have feelings for her boyfriend too but she is playing both ends of that candle and ultimately will get burned.
I almost get the feeling like she is trying to push you into or say something? Dont you? Why on earth .. if she LOVES YOU soooooo much would she even tell you something like that unless she was trying to deliberate provoke you into something?
IMHO.. you are upset because you know that whatever button she was trying to push by telling you that upset you .. but not for the reason you think... actually for the exact opposite. She loves you... you may think you love her.. but really look at the big picture and search for the real answer. You may be surprized. Hope I helpped.. :/
"Remember always, that you not only have the right to be an individual, you have an obligation to be one."
- - Eleanor Roosevelt
" It's not who we are that holds us back, it's who we think we're not."
- - Michael Nolan
"...to love and lose, is better than not to love at all..." .... Lord, whats his name....
" The world is big... I want to see all of it before it gets dark." -- John Muir