Irrational?

Is it irrational that I told my boyfriend that I love him and all his imperfections and that I love everything about him but he replied with "Thanks you're so nice" that is so unlike it and it actually kinda hurt that he responded that way. I feel like I get mad at little things and he told me that life is too short to be mad at him over little things but I don't know. I don't want to keep bringing it up but I don't want it to damage us in the long run. I told him I was definitely not expecting that response and got mad and left the conversation and went to sleep. And he told me how much he missed me and how much I meant to him. Im tired of getting irritated over dumb things but what if its not my fault and that I actually have every right to take it personally? Advice please? I don't want me to drift us apart. He's so sweet and caring but that was so unlike him and I just want to move on without thinking something is wrong constantly.