This is the exact show that incited said friend to be like "you know not everything is going to be gay right?"
That sure was egg on his face. Also while it wasn't explicit text till the comics, they literally, LITERALLY, had a wedding scene that was calling back to Aang and Katara's final romantic moment and then called back to those with our two female leads in that exact same episode not even like five minutes later it's so blatantly Clear And True and aaAAAAAAAAAAAAAAAAAAAAAAAAA I'm gonna go draw another lesbian (well she's bisexual actually but she doesn't know that yet).