You should tell him to stop texting you. Both you and his wife deserve more respect than that. You know why he wants pics, hes a dog. Don't respond to his texts anymore. I don't know why you keep asking questions about this guy, hes not worth your time.
That's the second time you have mentioned leaving him today, so just leave, im sure he doesn't deserve the heart ache you are giving him. BTW you are Biracial which means no matter who you date other than some one of the exact same mix as you, you will still be in an interracial relationship.
For my ex and i it was all day everyday, except when people were around that he was trying to impress. That was too much for me but that's because he was abusive.
You two, i would say you argue too often. Look into couples therapy. It would be good for the both of you and you can figure out...