'Big Brother' Star's Fiance Upset at CBS's LGBTQ Miss

CBS and "Big Brother" missed a chance to highlight an LGBTQ couple by deciding NOT to air castmate Michael reading a letter from his fiancé, Hayden Middleton.

Here's the deal ... Michael won Head of Household this week, which means he gets a letter from a loved one, but CBS didn't air video of Michael reading the note to his fellow 'BB' players.

Hayden tells TMZ ... he's upset his letter was not heard on TV because it would have been a good opportunity to highlight a monogamous, committed relationship at a time when there is a lot of negativity directed at the LGBTQ community.

Hayden tells us he doesn't think there was any ill intent from CBS and 'BB' ... but he's still disappointed because the last two HOH winners had their letters featured on TV.

CBS does not air every letter to an HOH winner, and this year only 2 of the 5 HOH winner letters made the final cut.