Is my boyfriend not attracted to me anymore?

me and my boyfriend have a sort of long distance relationship & he used to send me more intimate pictures and now he hasn't lately and he shuts down when I ask. I feel like he is self conscious about his size bc one time he asked if I liked how a lube got him more inflamed and he asked if I like it more. I don't know why he doesn't send me anything even though I ask him multiple times.
Is my boyfriend not attracted to me anymore?
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