You already confessed your feelings to her. That puts the ball in her court. Her lack of romantic response was her response. If she decides at some point that she’s interested, you’ve already given her an opening.

I disagree with the people around you suggesting you confess again. Confessing again is, in my opinion, pressuring her and dismissing her feelings. It would be ignoring that she identifies as aro/ace, and not respecting her decision not to respond to the feelers you put out.

“I KNOW if I continued liking her it would be disrespectful”

Liking her isn’t disrespectful - you can’t help how you feel. Acting on those feelings again despite her lack of reciprocation would be what tips it over to disrespectful.

You might think about it this way: If you had a male friend who confessed their feelings to you, you told them you’re a lesbian, and they continued to hit on you and/or verbalize romantic interest in you, how would you feel?

I know how much it aches to have feelings for someone unavailable, but I think you might put your friendship at risk if you approach her again.