Gregg Leakes apologized to his wife, Atlanta Housewives star Nene, for all that he's been "putting her through" as he fights colon cancer.

Gregg has been through multiple treatments, diets, and a dizzying dose of medication since he was diagnosed with colon cancer earlier this year.

And the treatments affected his mood, and his general demeanor.

His wife Nene Leakes has been open about being UNHAPPY with the way her husband has treated her, as he recovers from cancer. She claims that her husband - who is fighting the most deadly disease known to mankind - has become "mean" and "grouchy."

Earlier this year, Nene even claimed that she contemplated LEAVING GREGG over it.

Well Gregg wants to make sure that he doesn't lose his wife, especially at this difficult time.

Here's what Greg said last night on Instagram:

I wish i could get it right everyday & not be mean to my wife, doctors or anybody else. It’s NOT my intentions to be so. I stand in the “need” of Prayer... You can’t help but wonder what’s around the next turn for yourself. Forgive me Hunni, forgive me America.....

And he added:

We always hurt the ones we Love.. because they allow us to hurt them rather than snap back. I’m tired of hurting my wife who is only trying to take good care of me and wants only the best for me too. She deserves much more for her hard efforts and tireless hours spent on me. I Pray to God to get it together..
She’s done NO wrong... this is ALL on me......
Cancer WILL change your Life...