Part of me see why he left the way he did. His personality is one that bottle things up. I am a typical girl that wants to talk about issue. It create a lot of stress on him because all he want is space. I am not trying to find excuses for him. What he did is wrong but I understand he is in pain. He even went so far as to say he is going through a mid-life crisis.
I feel like my heart is in pieces but for some reason I cannot even cry. I have no idea what to do at this point since everything is just so confusion to me. I just feel like time have stopped for me.
Such is fair, you are assessing eyes wide open in this area of your relationship and you have compassion for why he is searching like he is... but life together requires paths together and in that is now also the silence that comes with it as well, it is painful I know. Making such a statement as feeling he is in a "mid-life crisis" is letting you know he is very unsettled by things he cannot identify at the present, or as you shared, will not talk about. Whether he is or isn't is something only he can initially sort out. If he opens up and allows you to be part then it will be much easier. Perhaps his abandonment is a one time sorting, but adult relationships are voluntary -all the time. If there is not full commitment, there will never be a full relationship.
While it seems to stand still, moment to moment is happening and makes the difference. There are moments in this that it is perfectly fine to take the time to find what exactly is confusing you, if you can identify those areas then you can rebuild the confidence you need to make good decisions for yourself.
Believe in yourself, take the time you now have to identify where you are, where you need to be, and how you need to place yourself there. Find a peaceful place to meditate or calm yourself so that when the right time comes you will have the clarity you need for sound decisions.
He is your Fiancé... these things are meant to be sorted out in this time, hope for the best but prepare yourself for the things you can strengthen within so that if this does not end the way you wish, it will give you the foundation for building something new that you can stand on tomorrow.