Adrien Broner Drops $137k On Engagement Ring ... For 'Ride Or Die Chick'

Adrien Broner put a ring on it ... proposing to his longtime GF with a massive 6 carat diamond ring ... and shocker, she said yes!

TMZ Sports has learned ... the boxer popped the question to Arienne Gazaway (aka Miss Louiebags) with a MASSIVE custom ring from Avianne & Co. Jewelers in NYC.

In fact, we spoke with the owner Joe Avianne who tells us, “Adrien came in last week to buy an engagement ring and dropped $137,000 on an 18 karat yellow gold ring with a 6 carat diamond in the center and 3.85 carats on the setting."

After Gazaway accepted, Broner wrote ... "When you got a ride or die chick you got to put a ring on it to let her know it's REAL .... I LOVE YOU @misslouiebags #LivingLifeStressFREE #RollieLIFE."

Gazaway is currently pregnant with the boxer's 7th kid.

Mazel!