Boyfriend said he doesn't know why he loves me?

So me and my boyfriend of 1 year were talking last night and he was saying he loved me and such so I stopped and asked him why he loved me. He said I don't know why do you love me. I went on saying how because he makes me feel cared for blah blah blah and then I asked again why he loved me. He said I don't know there's nothing specific it's just a feeling I get when I'm around you. Is that bad that he doesn't know specific things why he loves me?
Boyfriend said he doesn't know why he loves me?
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