Just read your answers and all are something for you to take in and consider carefully and honestly. And yes you are in limbo as one post said - (I think it is wildone). Anyway, I feel for you, I know how this can be. It's tough - confusing, lonely and sad too.
Do you have a means of living alone or moving in with a friend or relative? If you do, you may want to simply break it off as hard as that is, and if he comes around perhaps it is meant to be with you two, if not you have not lost anything in the bigger picture, as you will then know who or what he really is concerning your relationship. Remember, all things are a matter of relationship and choice. Think about this statement. Think about what you want and need for your self, for your life, what do you intend your life to be now and later. Afterall you are creating your future by the things you do today.
It takes two to make a couple. If there aren't any reasons for his behavior, like, depression, lost of job, feeling pressured into marriage, etc. then what is the problem? Is there someone else?? Is this what you secretly fear? I suggest concentrating on yourself first through meditation, prayer, self help, changing your thinking/feeling before entering into a conversation that may be challenging for you as to your fears. Sounds like you're walking on egg shells - can't be good. He has to be willing and able to respond and join in on this relationship, or what do you really have?
Well, enough of this. Ask yourself in clear thinking, not fear. Fear makes us make mistakes. The only way (generally) to overcome fear is by heading straight into it and breaking it thus conquering it. Do not let fear control you.
I send you light and prayers for all good things.