You ain't overusing the word ain't at all bro. You say ain't an appropriate amount of times in one sentence. You ain't going under or over, I ain't even playin fool.
Oh Mai. Man, I sorry I ain't meanin to dawg. I just ain't tryin to pay attention to how much I usin ain't. It such a cool word and all ya know. Makes me look gangsta.
Just wanted to let y'all know...
Ain't has been a word for years. They added it to the dictionary... I hadnt seen it, (cause I don't own one) but i do a lot of reading