When I first stumbled into anime, decades ago, I probably had a crush on Princess Ayeka from Tenchi Universe, but that's only because she was the known underdog within the community of fans.
I do have a favorite character, and characters that have a place within my heart, because I share some characteristic they possess, they have shared similar pain that I have experienced. But I wouldn't say that I have any crushes on fictional characters, anime or not. Perhaps having a connection with specific characters is more accurate.