It sounds as though this is very recent, so I would start by trying to give her a bit of space for a little while - try not to put pressure on her to get back together, although make it clear to her that that's what you want. I would start by asking her to talk to you about what went wrong, what you did wrong (if anything) - did she feel that you didn't help and support enough? did she feel you went out too much/stopped her going out? any of the usual problems relationships have. But first step is let her know you love her but respect her decision and will give her some space....i'm really sorry to hear you're going through this by the way, and I hope things work out for the best for you both x