[Friendship Related] Am i dumb or am I dumb?

My best friend of six (or... seven...) yrs just went through some mental shattering heartbreak with her situationship(don't judge). Like she genuinely lost her confidence and overthinks more than before this incident. He went back and apologized to her after realizing that he made a big fuck up. I feel like it's so fucking unfair that he just went back to her life, probably happier than ever, while here she is completely shattered by a mere male. But whatever, it's her heart. Not even she can control it.
So that's the context on why I feel like a fucking loser. We've been friends since middle school but these days, actually maybe since high school (we're not in the same major anymore), we're more like each other's therapists rather than friends.
She just vented to me about another friendship she got with this two fuckers who clearly doesn't give a fuck about her, but she still wants to give them a chance since they've been friends since HS. I just told her what makes a friendship special isn't the length of time, but how much they actually care about each other.
Which I think is ironic cus I myself think our friendship is special cus we're friends longer than anyone else's in our lives? Yeah she's probably one of the reason why I'm still alive to this day but idk.
Do y'all think I'm overthinking all this? We both care about each other I think, but at the same time we're literally opposites of each other. She's literally a total normie, that's why I can't really talk much about my interests to her cus i know she wouldn't care. She probably does the same cus ig she also knew I wouldn't care too much?
Girl idk. I'm literally shitting atm