Why is my boyfriend putting lol in most of his texts?

My boyfriend all of a sudden for the last couple weeks, keeps putting lol in most of his texts, even if they aren’t supposed to be funny. Any thoughts on why? I am thinking he’s trying to keep things light but I don't know

I've asked him if everything is ok between us, or is something was going on- and he said everything is fine.
Why is my boyfriend putting lol in most of his texts?
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