"— Ian never wanted anything serious with Joseph, but he began to manipulate him and guilt tripped over broken fingers, first to become friends and then threw a tantrum when he realized that his friend was sleeping with other people.
— Jo imposes his ideals and opinions on Ian, goes crazy with jealousy and also has a lot of flaws so stop trying to make him look like a saint, wanting to denigrate TJ.
— Ian really loves TJ. This is a well-known fact that was confirmed even by the author after the starfall scene, when Jo asked if Ian had a loved one. The answer was “There is... There was...”. Doyak explained that at that moment Ian accidentally blurted out to Jo that he already had a loved one (TJ), but then corrected himself, realizing that he had said too much, and pretended to be talking about the past."
If we are quoting others here then I'll alsoleave this here that someone else commented⬆️