Purely for discussion's sake, though, if you're stating that RJ Mitte is cute solely because he is disabled, that's another matter. Often, disabled people are infantilized (treated like children) or objectified (treated like things). This is a reality for disabled people - and a dangerous one. Obviously when you stop viewing someone as a capable, consenting adult there is an automatic imbalance in it. I occasionally was called "so cute" in school in this manner, and it was super off-putting. I also get the "you're too pretty to be in a wheelchair" comments, which are just gross. So it wouldn't be a bad thing to recheck your motivation, especially if you have any doubts about why you found him cute.
If you are attracted to the whole disabled person, though, it's not wrong.