Are there any signs that show a guy is cheating?

I know the cliche obvious 'staying late at work' and 'not being in the mood'

but is there a way to know he's seeing/ taking to someone else.

My my partner has been acting strange the last few weeks and I have a gut feeling something going on. I've asked him and he's denied it over and over again but something doesn't seem right..

(i know it's a bit vague but it's hard to explain.. just needed to vent a little and get it out properly.. )


any advice?
Are there any signs that show a guy is cheating?
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