I find that writing any kind of scene up to any emotion; be it sorrowful or excitement; requires you to vividly picture it, don't just think up sad sounding words, or happy ones if the scene is to be a blessed one... instead, if you want to write up a chaotic scene where a person is in true turmoil over the loss of something or someone special, just sit and think for a moment how you would feel if you lost your the person you loved most, don't just think it, let it play out in different ways until you actually cry yourself! Then remember how you that felt and went and interpret it into your writing; nothing is melodramatic when it comes to emotions, unless you play it off as such purposefully!!!
Here's a few example:
She hugged her legs close to her chest, her back against the door, trying her best to hold back the tears...
"Sandra, please... I know you're home... Open up! I'm sorry, alright!" He pleaded with her. She wanted to open the door only to throw it shut in his! But doing so... She knew she'd just forgive him all over. She loved him, yet... She had caught him cheating on her for the last time!
I'd say that is good as 'emotional'
_She held onto the door-knob as if anticipating when John would have showed up; she didn't expect him to already be waiting outside! _
The scene she played out in her mind of walking out just as he would walk up to her front door to beg for forgiveness as he always would and her flipping him off before throwing the door shut on his face!
_"Sandra, please... I know you're home... Open up! I'm sorry, alright!" He pleaded with her. _
"Screw you, John!" she yelled through the door, flipping her hair in jest as if throwing a show for her college friends.
"Sandra..."
And that is a bit more melodramatic yet, still very possible scenario to play out in life!
So it just takes some roleplaying...