What can I do to slim my round face? (Photo)

I have always had a full face. Even at my slimmest, my face remained round and full (I am trying not to say "fat" but that's what I feel like!). I was born this way and I remember being very self conscious about it from an early age. I have had botox injections to the massetar as show below. Are there any other options available to me. I am 39 years old, healthy and relatively slim everywhere else.

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