Relationship advice please

Anna

So, I have been dating my boyfriend for 2 months on the 28th, everything is perfect. When I say that i really mean it, we have the same sense of humor, the same music, he encourages me and always knows the right things to say, its just really great. Other than he'll get upset sometimes, and i can always tell hes upset because he'll only answer everything i send with "okay" or "yeah" and i have to ask him over and over, and even then he sometimes wont talk to me. If I get upset at him shutting me out he tells me its not his fault because all his exes emotionally scarred him, I understand that ig, but he shuts me out all the time. Other times he'll do the same thing and just tell me hes tired. Hes "tired" all the time recently, i just feel like sometimes he shuts me out because he doesnt know how to talk and be open, i just want to know how to help him.