I wish I knew who came up with that "bros before hoes" poppycock, so I could throttle them with my bare hands. Insipid gangsta bullshit. Fuck "friends", yay for love, I'd say.
However, in your case, that still means: Leave her be, as
Now guy #1 hates her, she still loves him
I kinda like her, but I haven't hung out with her enough to be sure of anything.
she's still ailing over her relationship and you barely kinda sorta like her perhaps at some time in the future we'll see. That sounds like a prime chance for ultra maximum hurt.