Just finished my rewatch of Boy Meets World, so please enjoy this list that I absolutely could expand of things canonically said either by Eric and Jack to each other, or about each other to others, that sound ~totally~ 1000% straight:
Cory: “You guys are so perfect for each other, you should be married!” Eric: “…I’m not ready.”
Eric: “Jack has made it perfectly clear that I’m just his roommate, I dunno why I’m letting this bug me.”
Mr. Feeny: “Well if he was ‘just your roommate,’ you wouldn’t be out here talking to me.”
Jack: “Wait a minute, Rachel’s not here anymore.”
Eric: “What are we still doin’ with our pants on?”
Jack, taking off his: “After you!”
Eric, also taking off his: “Why, thank you!”
Eric "You know somethin’ Jack, if I were a woman, I’d think you were swell.”
Jack, cheerful: “…Really?”
Jack: “What are you doing?”
Eric, staring: “Loving you with my eyes.”
Cory: “Why do you stay with [Eric]?“
Jack: "Because he’s my friend. Because I like him. And no matter what crazy things he says or does, I still like him. God help me, I still like him.”
Eric: “You don’t like girls! You know somethin’, I kinda knew that.”
Jack: “I like girls!”
Eric: “No, you just think you like girls!”
Jack: “What is this power you have over me?”
Eric: “I dunno.”
Eric: “Dude, don’t know if it’s the right time to say it…I love you, man."
Jack: "Dude don’t even, man. I’m the one that loves you!”
Eric:“Dude!”
Both: “DUDE!”
Bonus - Girl Meets World quotes that are ~totally straight~ as well:
Jack, to Eric: “Not a day goes by that your voice still isn’t inside my head, no matter what I do.”
Eric, about Jack, to his face: “…but the evil company is scum who turns clean water into dirty water, and hires really good-looking employees with pocket squares…and hair that goes ‘swoosh’…”
Cory: “How’s life treating you?”
Jack: “Well, you know, I’m at a middle school dance and your brother’s my date.”
Cory: “So, nothing’s changed.”
Jack, to Eric: “Keeping you around was always the best choice I ever made, wasn’t it?”