You can't help someone in the way you want to. She needs to be independent from you in order to get herself sorted mentally.
It is hard and crushing, we have all been there and it feels sh1t!
Don't try clinging to hope, its always easier to split up with someone by saying 'maybe in the future we'll...' because it gives you false hope which raises your spirits and the person dumping you doesn't feel as bad.
This is where you need to go no contact, keep yourself busy, see lots more of your friends and read plenty of threads in the broken hearts forum! It made me feel better to know i wasn't the only one going through it, and can make you feel better that others have it far worse!
"Never make someone your priority, when to them you are only an option"