The fact that the two of you are living apart from one another creates a stress for both of you. He may have misinterpreted what you were trying to tell him and if he did, this is probably the reason that he became upset over the comment.
To tell you what your chances are would not be appropriate for no one could really put a percentage on this other than saying 50/50. From the information that you have provided I do believe that he has kept you on his IM list because he cares about you and for no reason but this.
I am going to suggest that you take a moment and write out on paper how you are feeling about this. I am referring to the things that you have mentioned in your post... You love him... You did not mean for him to get upset you were only trying to be helpful because you appreciate the care he has given you, etc.
When you are done call or send him this information in an IM. You say that you have given his space and this time has most likely allowed him to have the chance to think about his hasty decision to call things off. If he is in love with you he will welcome the IM because many men (women also) do not like to admit they may have acted in error. Your message will get him out of the hot seat so to speak if this is the situation.
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