Guys, when you tell a girl how much you love her during sex - how true is it usually?

My boyfriend always goes "I love you so much."... Etc. he tells me he loves me outside of the bedroom too, but it sounds so much more genuine when he's inside me an says it. my friends tell me I should be worried. are they right?
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Sorry for typos. Using a slow iPhone!
Guys, when you tell a girl how much you love her during sex - how true is it usually?
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