Welcome to the forum, confused girl. Lovely to have you. I apologize for not welcoming you sooner.

Until your boyfriend is properly evaluated and diagnosed, there is no way to know if what he has is PTSD or not. He may simply be experiencing combat stress, which is a temporary condition, though it can become worse if not treated. I do hope he is going to be evaluated fully, as either way he needs to be in order to receive the proper treatment.

Now assuming he has PTSD, he will definitely have some personality changes and not be the person he once was. There will always be ups and downs. PTSD is a permanent condition; there is no cure at present. However, sufferers can learn to manage themselves quite nicely, though it takes time and effort on their part. We as carers can support them in their efforts, but they must want to change and heal on their own. In your case, the first step would be for your boyfriend to get properly assessed and diagnosed. All you can do is encourage him in that, learn as much about PTSD as you can, and be certain to take care of yourself as well. Be very certain this is the life you want for yourself, as it is a permanent condition. If you stay with him, you are in it for the long haul, as my husband says.

All the best to you, do please keep coming here, asking questions, and learning. There is much support to be had and much good information as well. Take good care.