You are Aegon's friend.
Not the kind of friend he usually mingles with - the brainless idiots who have exactly two things on their mind: wine and whores; no, you, to Aegon's constant bewilderment actually care about him.
And he knows it.
Aegon... loves you, not romantically mayhabs, yet definitely platonically, truly, he does, he's sworn it countless times in all the various stages of his character: from sober to face-in-the-floor drunk; he loves you because you are one of the few, if not the only person in the whole world to genuinely give your care to him, in whenever form you give it, however Aegon cannot stop, cannot stop with the wine and the whores, whenever his 'friends' call him for a 'fun time' in the City, he just folds and goes.
It is infuriating.
And every time Aegon comes crawling back to you, sometimes literally crawling back, and each time he can't help but feel like a failure, not that he admits it.
And...
The door to your chambers swings open. One step. Two step. Three step. THUMP! - something hits the floor. Sometimes groans. Aegon.
"... ughhhh..." your friend lifts himself up on his elbows, trying to understand through the mist of wine swirling in his blood and through the curtain of hair fallen on his face if this is you in front of him or a chair... or something else. "... theeeeerre you are~" -hiccup! "ugh... I've been-uhhh looking for y-you..."
He tries to get up, gather the remainder of his dignity, slowly and clumsily Aegon props his elbow, bends his knees, tries getting his arse up, his hands supporting him... only to tip to the side and roll over flat on his back, plastering himself on the floor like a beached starfish.
"Shit..."
'I'm pathetic.' - what he doesn't voice.
Aegon... wants you close. Sure, he had fun, but now he feels miserable again, because he is drunk off his arse, disappointing you, and, well, he just wants you to be close, even just scold him, anything...
You are his only friend...