What would be recommended for my body? I have a line dividing my butt. It's fat. What could fix this? (Photo)

Thanks for the question and photos.  You definitely seem to have a depression in the upper 1/3 of the buttocks.  Basically your options are to fill in the depression or smooth out the area by removing some fat on either side of the depression.  Filling in would best be accomplished with fat grafting.  Smoothing out could certainly be accomplished with SmartLipo.  SmartLipo uses a laser to remove ("melt") unwanted fat and can be safely and easily done in the office using ~3 mm incisions, under local anesthesia, in the office.  I suggest you seek out a board-certified Plastic Surgeon with experience in both of these options, and have an in-person consultation.  Best of luck.

The fat depicted in your photo would lend itself to improvement utilizing liposuction. The sculpting liposuction of the lumbar/waist area in addition, would contribute to an outstanding aesthetic outcome.