for heart shaped faces, since you wanna emphasize the lower portion of your face would glasses like: https://www.warbyparker.com/eyeglasses/men/haskell/woodgrain-tortoise and http://www.framesdirect.com/framesfp/Burberry-palathp/r.html work in your opinion/view?
i personally like the first one! its cute and i think would look good on heart shaped faces because they are triangluar a bit.