How to fix my asymmetric face/jawline?

Great question.  EVERYONE  has differences between the sides of the face.  It is just a matter of degree.  First question is whether the asymmetry affects the relationship of the teeth?  If not, in your case I would recommend fillers to the smaller left side to match the right. Maybe consider a neuroblocker to the masseter on the right.  The neuroblocker(Botox, Dysport, Xeomin) will diminish the size of the muscle in the lower face( not approved by the FDA for this purpose). Start slowly, and build to your goal or what you want.  I would recommend developing a relationship with a professional who could work with you to achieve the changes you want. Lastly, the people who tell you that you look like a "cotton ball on your left cheek",  they are the ones you need to avoid (I am saying that nicely).  You look great, go out and have fun!!!!!!

you can use fillers and implants to help asymmetrical faces.  Please see an expert for an evaluation.  Botox can be used on jawlines and liposuction to the face can even things out as well.  Best, Dr. Emer.

You have mild degree of facial asymmetry that we would consider normal. It this bothers you so much best solution in your age would be augmentation of the entire left side of face with fat grafts. It works very well with young individuals. However, you should find a plastic surgeon with significant expertise in facial fat grafting and discuss your options. Good luck.