Girl troubles.. help?

Well about nine months ago I started talking to this girl over the internet. We then started texting, basically she always let me flirt with her, never hung out cause she was nervous. But now she got a boyfriend and she constantly talks about him. She says how he doesn't text her much or something like he's ignoring me. :'(( It's irritating me cause frankly I don't give two shits about him. She always seems to rub it in my face, but as soon as I said oh there's a cute waitress flirting with me, to see what she says, she gets passed and said bye. And it just baffles Mr that she can date whoever the **** she wants, but as soon as I bat my eye towards another girl all he'll breaks loose. Why are woman so difficult???????? I'm sorry but I don't feel like wasting another month on some girl that's gonna just treat me like ****. Nine months I've wasted and have a crush on her, it's more like love... but I just don't know what to do. I'm sorry that this is long or if it seems like I'm whining.. but yeah.