Jacob Sartorius

'We're Not Friends' may be about the singer's failed relationship with the young 'Stranger Things' star.

The two stars have been dating for about seven months.

It's been a wild ride for Hollywood romances.

Round 1 kicks off with twelve of pop culture's biggest male stars.

The 'Stranger Things' star is clearly in love.

Millie and Jacob are too cute!

Consider our hearts broken in perpetuity.

Watch the teen couple perform Sartorius' 2017 track 'Nothin' with You.'

PopCrush combed through a deep trove of potential talent to find the 24 most promising next-gen celebs of 2018.

"Happy Valentine's day J @jacobsartorius," the 'Stranger Things' star tweeted.