My boyfriend has lices and I don't know how to tell him?

Him and I are on a long distance relationship for more than a year. He told me several times he has lices. And i got stunned by it each time. It is just so yuck and disgusting me.
How can you ever live with that and be so chill about it? How should I tell him guys I'm super disappointed...
My boyfriend has lices and I don't know how to tell him?
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