Lol I like how we all don't agree with this pacing xD but hey, if you think about it realistically, her crush on Fumi was short lived, so it should be easier to get over with. I know amt of time doesn't necessarily equal amt of feelings, but if it's shallow, then it's shallow lol. Her love towards Yoh was invisible until she got heartbroken, I guess, and then it crept up to the surface :3 now Yoh gotta remove his "barrier" lmfao xD
Haruna needs to think about it this way: if Yoh's ex was the complete opposite of her and it didn't work out, then it's good not to have anything in common with her. Because Haruna is different, so it's gonna work out differently C: probably to her advantage eventually, when Yoh's feelings for her grow stronger