First of all, thanks for your reply.

Indeed, she was thinking during this time and I was reflecting too when she mentioned it first. But in that moment I didn't understand completely what she meant and I made things worst in this time.
If she is gone there is nothing I can do about it, but we will have this last conversation because we agreed on that one month ago, plus are living together (for more than two years).

I think the things started to get not so good since this year. In that time, I was kind of blocked and in a terrible state because other aspects of life (family, etc) and I also needed a break. But I didn't expect to be this kind of break leading to a break up with her. Anyway, in that time I was more distant to her and had a doing nothing feeling for some months. Yes, she called me attention at this issue but I was kind of numb all about it. Now that I spend some time outside, I am feeling more energetic and positive, and actually the first month that we were apart everything seemed to be better and we were talking about doing many plans together. Nevertheless, she also realised that many things weren't working, started thinking that we don't match or that I can fulfil her needs. I realised I was selfish, distant and that took her for granted, but it is also true that this year has been particularly terrible and at that time didn't react to get things done.

Sometimes happens that one reflects and realises things when is already too late. My reaction was to try to give her the confidence to get things better, but by this time I went into a clingy mood and she seems to be checking out during this last month. I feel there is not anything else I could do before we talk, but if there is the chance to save the relationship I would do things in a very different way. It is human to make mistakes. In a way, I think this crisis was necessary, either to break up or to start a new beginning. I am for the second, she is for the first. But I am pretty sure that can be worked and that I can do things other way or otherwise I wouldn't even bother to ask her for that. But it is hard for me know to get her trust and willingness back....