I didn't say hump every skirt that you come in contact with,
social interaction, go out for drinks, dinner, coffee, get used to interacting with the opposite sex, etc.

Yes I said, "DATE", I didn't say find a lover.

Do you want to send her the right message?
Everything you've done so far has been your attempts at sending the "right" message, how has that worked for you? She's seeing another man, and she doesn't want you anymore yet you want her and she knows this. So why not try the opposite, something counter-intuitive and see what happens.