Subaru x Reader

Subaru Sakamaki. You don't say a word to him, as you're very aware that the smallest things anger him. His temper aside, you know there's a good side to this tsundere boy, you just have to find it. Sounds easy right? It would be if he didn't keep switching personalities every time you look at him.
Subaru becomes protective of you overtime, and the two of you grow closer, but you realize his past is holding him back from popping the question for you to be his.
Will he ever open up to you in order for you two to be more than desk mates, or will his trauma push you away while he wants to hold you close?