Pretty much it. Again, most of this is unconscious-Star and Marco are 14 years old and likely haven't had an in-depth/non-surface crush on anyone by this point.
But you know what's just as interesting as the lyrics posted to Just Friends?
The actual song at the end of Just Friends is Too Little Too Late (the same song Tom sings too). These songs are ALL made for the show, and the lyrics definitely matter.
The last lines of the song that WE hear at the concert are
"We spiraled high on a gust of love
And I knew right from the start
Nothing could tear us apart
Til the day you broke my heart"
then Star walks out
but the ACTUAL last lyrics of the song are "and now it's too little too late"
the fact that they consciously omitted those lyrics at the end of Just Friends, when there clearly was time indicates it was more than a stylistic choice, given how all these songs are custom-made for the show and have full verses/versions, etc.