This is driving me insane

The hint does not help. We've been stuck on this for hours

• Hi, could you provide the source for this puzzle? Thanks. Jan 14, 2019 at 8:18
• Incidentally: "We've been stuck on this for hours" Jan 14, 2019 at 8:58

As the hint suggests

MIRROR-ing upside down

maybe the answer is

WE

as the result of

mirroring "ME".

• It's a bit confusing as it's not mirrored but actually rotated. Jan 14, 2019 at 8:41
• @rhsquared oof you're right Jan 14, 2019 at 9:18

Solution:

I will always see you within me.

Explanation:

Assuming the aphorism is,about close friends or lovers. 'We' are you and me, the letter 'w' is a rotated 'm', friends or lovers do complement each other while having a significant common base, so it makes sense to see the other upon introspection, looking from 'behind the mirror'. Metaphorically speaking one rotates the POV. On the other hand, watching one's image in the mirror, to some extent one sees what constitutes the other.

Obviously:

I will always see reflections within me - refering to the two reflections needed to restore the mirror to normal. Could be talking about this or this.