Engaged/ Dream about my ex

It was a crazy dream he's not my ex he was an old friend we kissed a couple of time but never sex. We ran into each other a couple of weeks ago again after almost 3 years. Then out of no where i had a dream about us having sex but not normal sex that sex that makes you cum every 5 minutes and kind that has you thinking about it all day making you wet asf ughhh idk what to do i feel like i cheated on my man even tho it was just a dream but i feel guilty

Any advice????