I have PTSD. My mother also has PTSD. I have told my mother I love her hundreds and hundreds of times. It's how I end every call with her. She has the chance to say it back, but she very very rarely does. It's ok with me. She shows that she loves me in other ways.
I think you are seeing that he loves you in other ways too.
i have recognised some things with the contact on here and just remmbering times when i have been with him with the way he has shown me love and showed feelings... that at times i dont think he even recognises them as feeling? is that normal for PTSD that its actually hard to realise what feelings are?
Nothing you have described so far suggests someone who doesn't feel feelings or can not name what his feelings are. There is another condition called alexithymia. It is an ability to name emotions or identify. It doesn't seem like that is what is going on, but he would be the only one to say. He is able to identify love and that it does sometimes hurt.
"Love hurts" is not unique to PTSD. Heck, it's so common it is a song title....
Instead of focusing on his possible pathology and what might be wrong with him or not, try to focus on how he is showing you love, even if he isn't ready to say it yet.
Ever heard of the book the 5 Love Languages? In that book, it outlines different ways people "speak" love to each other, and different ways people receive love. The author proposes that people speak love to one another through acts of service, words of affirmation, quality time, physical touch, gift giving. You guy is showing you love through many different ways, even if he is not ready to say it. Keep that really great list with you even if you never show that list to him. When you start to feel anxious, remember the ways he does care for you and love you.