Welcome to the forum Myaleah, lovely to have you. I am sorry for your hurt with your boyfriend at present. However, if he does indeed have PTSD and has asked for a break, you must respect his wishes. PTSD sufferers go through periods where they need space, especially from loved ones. Any efforts on your part to keep contacting him will only serve to push him away further. My advice to you, as hard as it is, is to wait until he contacts you first. In the meantime, you may wish to educate yourself about PTSD as much as you can, so you may understand his actions. There are many helpful articles upon this forum. This article is an excellent place to start:

Understanding PTSD - Edited

Take good care, and hang in there.