Time for you to break out your makeup kit and put your freak on.
Actually ... I think the day is about rebuilding those bridges between the estranged.
If you say "makeup" you're talking a noun used to turn females into painted women. Men are not above this process either.
I know elderly superintendent poofs who wear too much makeup at work in an attempt not to appear the old farts that they are.
If you say "make up" you're speaking of constituent parts, assemblage, and perhaps apologetics.
Since the day day is about restoring friendships and bridges between others and yourself, overlooking faults and attepting to achieve repair of relationships which may have seen better days ...
It's about making amends, apologizing, and being friends and therefore the word is "make up".
It has been my experience that the spelling of the term is less significant that what it represents.
I tried to reach out once to make up for a wrong but was utterly rebuffed.
I suppose it simply was over though I could not accept that either.
So calm down and accept your fate but at least TRY to
Reach out and make up today if it's indicated for you.