<human>: I've [22F] been together with him [22M] for about a year and half now. We've had major issues but worked on them pretty well.

I recently was experiencing a lot of hair loss/hair thinning so I decided it was definitely time to see a doctor. Saw the doctor, got blood work done and found out that I'm actually diabetic, have high cholesterol, low in iron and in vitamin b12. I am overweight, but not considered obese and I have always been the same weight throughout the entire relationship. In my family, all members have high cholesterol even with being in a healthy weight. So no surprises here. 

I have a medical background so I know these things can be treated/maintained at healthy levels with diet, exercise and medication. I know I've got to make the change and although it took this to get me going, I'm going to change my lifestyle for the better. At this point, I'm being optimistic about this.

After being diagnosed with such I discussed this, though not so willingly (being a bit embarrassed), to my SO to which he said "that's just nasty!". When I asked him "What's nasty?", he replied "You, you having diabetes and all that! You know I'm a health freak somewhat. I'm not sure I can handle this. This is like cancerous. So nasty." After he said that much it was enough for me to simply hang up. I moved on to do laundry to get my mind off of it. But eventually broke down crying. I never felt so disgusted with myself, like as if I was so unworthy. 

In my field sometimes it is hard for relatives and friends to accept a loved ones condition. But never in MY life did I think I'd have someone, not just someone but my SO feel that way.

I'm really shocked and not sure if I actually want someone this...unsupportive? as this. 

I'm feeling very upset over this and I'm starting to feel as though this is it. This is my deal-breaker. But am I wrong in this?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: SO[22M] called my recent diagnoses' "nasty" and how he is "unable to deal with this". Not sure if this is really a deal-breaker or I'm overreacting?