Emotional boyfriend...

So I’ve been with my boyfriend for 6 months and we’re great. He’s amazing and I wouldn’t trade him for anything! But I’m constantly reassuring him that he’s good enough and I’m not leaving him. Every time I’m having a problem or a bad day. He always turns it around on him and blames himself and then I feel bad. Even tho he doesn’t even know the problem. So conflict never gets solved and I’m loosing my mind. What do I do? I don’t wanna go off.