So a teenage guy blushing over a girl's sexy outfit is not proof that he finds her attractive?
He's embarrassed that she's showing skin, if he didn't see her sexually at all he wouldn't have had such an intense reaction. Also Yoruichi was naked when she made Ichigo blush, of course he's going to get embarrassed over seeing a naked woman and Rangiku was intentionally trying to seduce him while lifting her skirt. Orihime was simply wearing a revealing outfit.
Orihime getting jealous of Ichigo and Rukia's bond is not proof that they have romantic feelings for eachother. By that logic are you saying that Nel and Ichigo have romantic feelings for eachother since Orihime recently got jealous of Nel over Ichigo last chapter? Rangiku also told Orihime that "she was a fool" for being jealous of Rukia, that Ichigo needs them both. Orihime also hasn't gotten jealous of Rukia in over 200+ chapters. When something is not mentioned for a long time it usually means that things have changed.
Ichigo is more protective of Orihime than he is of Rukia, he's gotten angry at Shinji for flirting with Orihime and gets easily angered when his enemies threaten her. He constantly asks Orihime if she's okay during battles and tells her to stay back during fights. Aizen, Ulquiorra, and Grimmjow frequently used her as a way to goad Ichigo because they knew how protective he was over her.
Yes the Hollow is what brought Ichigo back to life but it doesn't change what caused him to want to come back to life; to protect Orihime. It doesn't prove that he has romantic feelings for her but it does prove that their bond is strong and not any less important than IR's.
Again, Ichigo and Rukia having a strong bond doesn't prove that it's romantic nor does it diminish Ichigo and Orihime's relationship.
Yes Ichigo is protective of all his friends but the difference is that Orihime's in love with him. He has romantic potential with her unlike Rukia who has no romantic feelings for him.
When a main character is teased about a love interest it's usually evidence that he'll end up with her. Chad is one of Ichigo and Orihime's closest friends and he seems to support a romantic relationship between them.
Yeah lots of people ship IchiRuki in fandom but when it comes to debates I think IchiHime has more canon evidence.
Sexual attraction doesn't equate to romantic love, and also, Ichigo has been shown to be embarassed by such things, as he is conservative. You can blush out of embarrassment as well. It doesn't have to mean that he is attracted to her beyond sexually. Furthermore, you said that he blushed when Rangiku tried to seduce him, keyword being seduce, because Orihime's entire purpose behind wearing that outfit, as it was later revealed, was to try to seduce Ichigo. She wasn't "simply wearing a revealing outfit".
She was jealous of the connection they had, and because she saw how Ichigo responds to Rukia, noting that she doesn't have that same kind of bond. She wanted what they have, and she knew that they had a special connection with each other. It wasn't the same as the Nel example. On an unrelated note, I like Orihime, but I thought that was a bit shallow. Why get jealous over that scene when you know Nel is like a sister to Ichigo, and that Ichigo doesn't like her romantically? Anyway, moving on.
He isn't more protective of her than Rukia. Context matters. For example, Shinji. He was wary of Shinji because he and Shinji had just fought the night before, and Shinji showed him his hollow powers. Shinji was a threat to Ichigo. He tells her to get back during fights because, don't kill me for it, but she's relatively weak. Fighting isn't her specialty.
The bond between Ichigo and Rukia is much stronger. Keep in mind that I never said that Ichigo and Orihime's wasn't, but that Ichigo and Rukia's is stronger than Ichigo and Orihime's. That is a fact, as I've said. The only person in the manga that has consistently had a positive emotional impact on Ichigo is Rukia. She is the one that picks him up when he is down, she is the one he responds to. It's highly likely that chad could have been about to snuff it via Ulquiorra and he would have risen to protect chad too, because that's Ichigo's motif.
So because Orihime is romantically attracted to him, he has to love her? Rukia has been shown to have possible romantic attraction to Ichigo, more than Ichigo has had for orihime.
So because Chad "seems to approve of a relationship" between the two, it has to happen? Ichigo doesn't have a say? Honestly, it doesn't even really come off as teasing him as much as it does forcing her on him. If he likes Orihime, fine. Let him make his own choice.