Should I take it to heart? Was he serious?

My boyfriend and I were on the phone. We've been together two years and last night I asked him if he loved me and he laughed and said "no there are prettier girls than you" and then he laughed and said "I'm joking baby I love you". My question is does he really think girls are prettier than me or was he joking because in the past he's told me that I'm the most beautiful girl in the world and that he's never seen anyone more beautiful than me. Despite this I still feel hurt because he said it last night all though he laughed. I'm not sure wife he was joking and I'm taking it to heart or if he was being serious. I know he loves to tease me and likes messing around and irritating me. What do you guys think?
Should I take it to heart? Was he serious?
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