But what should I have expected, given what I already told you?
Do you wish to work it out with your boyfriend?
No, I don't think so. I just want him to stay out of my life
If you have expectations that didnt pan out it is ok to be upset. Dont be hard on yourself for having a perfectly natural emotional reaction to the situation.
My problem is real and I shouldn't have to deal with it.
In that case, I can understand your frustration, and your desire to simply be finished with it.  Given what you told me before we started talking today, I think you are doing the right thing by simply moving on from this relationship.  It will be better for you both in the long run.