Not even friendzoned, dude tried to rape her. "Oh sorry I touched you repeatedly without your consent, I assumed there was chemistry". What the fuck kind of reasoning is that?

21 is an adult and attempted rape isn't "a good person who fucked up". A good person who fucked up is getting too drunk and throwing up, not trying to forcibly assault someone else. At 21 you should know not to touch someone without consent.

>will in due time prepare a formal and in-depth apology where I plan to detail what exactly I am sorry for

Maybe actually leave her the fuck alone. Victims of sexual assault don't like to hear from the people who assault them. You'd only be apologizing to make yourself feel better. There's a reason why she doesn't want to hear your apology and that's because she doesn't want to have to make you feel better for being a predator. Leave her ALONE

>I did not rape her and I was not attempting to rape her.

No, you DID attempt to rape her when you stuck your hands between her legs. Just because you weren't violating her with your penis doesn't mean it wasn't attempted rape. You were trying to touch her vagina and/or penetrate her. The line between sexual assault and full blown rape is pretty thin and just because you didn't continue to cross that line doesn't mean that isn't what you intended. You're a fucking disgusting person and shouldn't be alone with a woman ever.