I'm going to break up with my boyfriend because of chronic illness.
Why is a chronic illness going to cause you to end your relationship.
I get sick of watching him suffer, it's just disgusting.
Leaving your partner over a medical problem seems pretty messed up. While it should not be a reason for you to be trapped in a relationship, there should still be other reasons for you wanting to leave. Saying that it is disgusting to watch him suffer just makes it sound like you are leaving soley for the illness.
No, I'm going to break up with him because I can't stand seeing him like this.
You don't have to stay in a relationship that you don't like, but breaking up because your boyfriend is sick is really callous. I think you should try to be more understanding. How would you feel if someone broke up with you because of something you had no control over?