My boyfriend suddenly decided that he wants to wait until marriage. Is it really strange or am I overthinking?

My boyfriend and I, both 20, have been together for nearly two years and were friends for years before that. We grew up in a Christian environment, and his father is a minister. Even though it conflicted with our religion, we decided to have sex, feeling committed and planning to marry in the future. Recently, he told me out of the blue that he no longer wants to engage in anything sexual, wanting to protect our relationship and grow closer to God. I respect his choice, but it felt sudden. Are my concerns valid, or am I overthinking this?

My boyfriend suddenly decided that he wants to wait until marriage. Is it really strange or am I overthinking?
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