@Itif Reality: That they have PTSD according to multiple healthcare professionals.
Yes, but what does that mean? Why does it matter?
Really, I'm not trying to be dense, but there are about 1,000 different possibilities here.
1. Is he/she doing something you don't like, & think is attributable to PTSD, & will go away if they -using a very broad term here- seek treatment?
2. Is he/she doing something you're perfectly fine with, but that infuriates/ terrifies/ confuses them, that you think they will also be perfectly fine with if they seek treatment?
3. Is he/she trying to seek treatment, but keeps looking in the wrong place? AA or Bipolar disorder or church or friends <insert about a thousand more things>
4. Is he/she in treatment but not the kind of treatment you want?
5. Is he/she perfectly happy with something you find to be a major problem?
6. Is he/she having a major problem with something you are perfectly happy with?
7 - 1,000.
I know it probably seems perfectly clear in your head why being in denial is a problem & what facing reality means, as you're the one actually in that situation, and in your own head know the reality you want him to see. I'm on the other side of a screen though, and just from my own history of dating people with PTSD wouldn't be able to guess what the problem is, nor could I even begin to theorize what reality means to you. People's realities are almost unique to themselves. There are places where we intersect with others (who are usually friends, people we respect, etc.) but if you take a minute and consider the realities & life views of every freaking moron you've had to deal with in the past month alone? Their views on life and your own? Probably don't line up so well. Consider me one of those morons, & explain what the reality of having PTSD means to you, that he's either not seeing or disagreeing with.