Weight loss causes reduced volume in the cheeks, which deepens the nasolabial folds (smile lines).
I would consider injection of filler materials to the smile lines (Restylane is a good choice) or to the cheeks (Voluma, Restylane, Perlane, or Sculptra are all reasonable choices).
Congratulations on losing weight, you should be proud of yourself. Facial changes is a common occurrence and easily taken care of with fillers. Seek a cosmetic dermatologist or plastic surgeon with expertise in treating men. I wish you the best of luck, Dr. Emer.
Your face will change and look different as you lose or gain weight. What probably would make you feel more balanced when looking in the mirror would be to fill in the mid-face area (not the nasolabial area). I would suggest either Sculptra or Voluma to replace the lost volume. I have injected many men with Sculptra and it has extremely gradual and natural looking results lasting two years. Please consult a board certified dermatologist for the best results.