I'm pretty sure it's Show Me Heaven by aelia1980 located here

Here's the summary just to clarify why I think its this one.

For almost a millennium the people of Heaven have been living in a society where homosexuality is the norm and heterosexuality is strictly forbidden. Ruled by the power-hungry Padaleckis and their ministers, the world is a place with strict laws, few rights and entrenched habits. When Jared, the President’s son, falls in love with a girl, his father makes him date the gifted but socially awkward pianist, Jensen. Forced into a fake relationship, Jared treats Jensen with nothing but contempt, while Jensen tries hard to be Jared’s friend, just to prove them both wrong. In the course of time, Jared sees more than the freak in Jensen and their relationship develops into friendship. When Jared faces unexpected and life-changing tasks, Jensen proves himself to be not only Jared’s constant but also his eye-opener, causing Jared to question their centuries old laws. Can Jared make a difference and change Heaven into a better world? And will Jared see to whom his heart really belongs to?

Thank you so much for helping!!

You're welcome, glad that it was the right one.