Most Helpful Girl
Oh god don't send her that message, that message is so "I'm really, really passive and only expect that you'll probably reject me so I'll suggest we be 'friends' so I won't lose you in case you change your mind later.
No, be blunt, be straight up. Don't give her the whole "oh you don't have to", because she knows she doesn't, she'll decide that on her own. If you want to send her a message by text and not to her face (I personally am all about face to face) then I suggest you don't fear being a bit forward. Say something like: "Listen so-and-so, I really like you and I find you very attractive, so I'd really like to take you on a date some time." It's straight forward, blunt but not too aggressive. It shows confidence and romantic interest. That's all I can suggest.