WHITNEY HOUSTON AND RAY J BACK TOGETHER

Whitney Houston and Ray J sure seemed very couple-y outside a restaurant in West Hollywood last night -- because when it came time leave, Ray J was the PERFECT gentleman.

As the two were leaving Le Petit Four on Sunset Blvd last night, Ray J opened the door for Whtiney, made sure she safely snuggled inside, and then shut the door for her. Chivarly ain't dead!

The two have on-again/off-again for several years. They were last rumored to be together back in 2010.