He is just been childish

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We do love often with no reasons, sometime against the reasons, and cannot anything about it.
What your bf wanted is to hear nice things about himself that you like int him. We, men, unconsciously need it very much. Tell him how funny, strong, sexy etc. he is - and he will fly around you. Do not reply that you cannot think abut anything in particular. He will understand it in the different way then you. To him you love him for something you can appreciate fin him, and if you cannot think about anything in particular - that makes him insecure. Be a smart girl - live happy.