(Yes, I was listening to this song and I came up with this)
"I'm the queen of broken hearts
Break you in a thousand parts
Used to be a shooting star
When did I become so dark?"
"Yeah, you need to chill, girl, don't play me
I'm too far gone, you can't save me
And I don't care, f- hate me
"Take anything, make it about me
It's a heavy crown, it might drown me
I know it sucks being around me
So does life, don't at me, don't doubt me"
How many times people broke Sun's heart, willing or not?
Moon is at the top of the list, with broking Sun's heart in pieces both willing or not a lot of times.
Then there is Nexus, that is almost 1⁰ with Moon, because of how much he broke Sun to the point of severe depression, numbness and desperation.
At the 3⁰ place we have Solar, Lunar and Atlas with their death, which they couldn't control, but it still hurt very much for Sun.
After them, we have Eclipse, who abused and tormented Sun.
Then we have Dark Sun, and maybe Titan, with all his manipulative game and sh*t.
At the last place, we have Rosie Bell (and maybe Joy and Seb) that trew Sun's friendship out the window for some other person or/and reason.
The only person that treated Sun right for all the time she knew him is Terra.
She was, and still is, a very good sister to Sun, the same goes the other way; she is the only completely positive and healthy (I think) relationship Sun had back then and still now.
Terra never backstabbed/betrayed/turn her back on/left him and really love their relationship and dynamic, it's so cute and sweet!
I think she is one of the reasons why Sun hasn't gone to the deep end until now...
So the big question is: How much until Sun looses it for real? How much until he really snaps and start going insane for real this time around? We already saw some signs, the thing is if he snap out of it or if someone helps him before it's too late, and with how that family works? Maybe we already know the answer to these questions.
(I think the are other people, like the Creator, that hurt Sun in some ways, but either Sun didn't care in the least about them or the things they did to him, so I don't know if that counts)