Naj! Nightmare x Nightmare! Reader

You and nightmare have been childhood friends. (Along with Dream) Nightmare recently gotten into a relationship with Muffet, but she is a cheater.
You secretly have a crush on Nightmare but your very honest toward nightmare only.

But you now looked different and we're like OG Nightmare (Original Nightmare) but with light purple Tentacle

Will you confess your love and be with nightmare and break him up with Muffet?
or
will nightmare confess to you after breaking up with Muffet?