I'm (17F) christian and everything about my bf turns me on

So I'm (17F) and he is (18M) and we both are christian and wants to follow jesus christ obviously, but I get so turned on by him for absolute no reason and also we don't see eachother often he has never dragged me into those type of things or asked for anything we don't even tell eachother we are horny and we should do something but like i know how we crave eachother it's so hard for me to control myself and i end up pleasing myself everything about him turns me on, basically I have insane sex drive and when I'm emotionally attached to someone I give in.

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Also when I had no bf I felt nothing like no lust or any type of craving for this I'm trying to get better but i always end up doing the same thing i want this relationship to last long and with lust it will never.

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What should I do?is it good?how to get better? should I tell him?how to fix it