Does he not find me attractive anymore.?

Soooo my bf ans i been together for a few months now and well when he had sex the first few times he would cum fast..... now it takes him like 30min to an Hour to cum...? Soooo is that something normal that tends to happen... i mean he always get turned on when he’s with me everytime... which isn’t a problem i just don’t know if that’s normal that’s before he cum fast now he takes way longer....?