What The Hell Is The Guy Code?

I am not gonna lie. I really like this girl a lot. The problem is the friend (her ex) and I have been life-long friends and the thought of us getting together hurting him is not something I want. I want this girl but I am unsure if it's worth the risk of one of my best friends. I never expected or even attempted to bring this relationship with her to the level it's escalated to, but the thing is she and I are pretty prefect for each other.

Am I scared? Of course. Do I want to hurt or piss off my friend? Absolutely not. Should I take the chance cos it may never come like this again? I have no frickin' idea!

Maybe I shouldn't have started talking to her on facebook but she was only really asking advice on other guys. It was completely innocent. But it kept on getting more and more until it became a daily thing. Now we talk all the time. The bad (and good) thing about it is I like it way too much to be healthy.

BUT (and here's the but), I cannot forget about the friend and even the thought of me bringing it up to him makes my stomach turn. So far it's great but starting something further there is always risk. What if it wouldn't work out between us? Then, not only will I lose her, I will probably have lost a great friend. But if it does, and he sees that we are happy, maybe he could be happy for us. I just don't know. I just think I should stick to the guy code and play it safe but I'm still torn up to hell and back at missing out...