boxicons/svg/regular/bx-heart-square.svg

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="m11.998 17 4.186-4.186a2.745 2.745 0 0 0 0-3.907 2.746 2.746 0 0 0-3.907 0l-.278.279-.279-.279a2.746 2.746 0 0 0-3.907 0 2.746 2.746 0 0 0 0 3.907L11.998 17z"/><path d="M21 4a1 1 0 0 0-1-1H4a1 1 0 0 0-1 1v16a1 1 0 0 0 1 1h16a1 1 0 0 0 1-1V4zm-2 15H5V5h14v14z"/></svg>