'Ello hun welcome to the brood!
And as long as you know this won't tear you apart for good then you're already heading in the right direction. You wouldn't be best friends if you didn't fight every once and a while. Being best friends is not about always pleasing and always agreeing with the other person, that would make you acquaintances not best friends. Real best friends fight, they tell you that shade of orange washes out your skin tone, they lend you a pair of pants when yours rip when out on the town, they tell you to dump the loser, you fight again, you experiment with making fried dough, you hug and you go about being best friends again.
Good luck hun!