Someone on Duolingo commented that "-ar" verbs are pronounced with a grave accent (mid-falling to high-falling pitch) while "-er" verbs are pronounced with the acute accent (high->mid to low pitch), but here "älskar" is pronounced with acute accent. Is it an exception, or did I misunderstand the rule in the first place? Or is there no actual rule? Tack.
No, because you in 'I love you' is an object. Therefore, du must be in the object form, dig. So it's Jag älskar dig.
It's just that you happens to be the same word in both cases in English – compare to how you wouldn't say He loves we – 'we' is an object so it has to be 'us'.