NO DEARIE, YOU SHOULDN'Tof course not, your di ck has no meter, but your consience does

and believe me, it will flog you for a loooooooooong time

this sex thing is a pleasure that only lasts for a moment, so what happens the next time your privates is thirsty?? have you thought about that?? i guess not. Why?? because the hunger of sex doesn't think about tomorrow

Now you said you've been clean since 2004, don't you think that going astray would ruin the whole 3yrs you've waited and make you hungry for more.
You said you loved this girl, right?? well love is all about sacrifices, let this be the one you sacrifice for her. I'm sure she's not asking you for more than that.
Let this girl be your pride, say to yourself, "if she would be clean for me, forsaking all other men, then why can't i do the same?"
Now picture you find out she's been doing another guy behind your back, how hurt, dissappointed and devastated would you feel?? well that's exactly how heart-broken she would feel if she found out. You might say she wouldn't but, but dear where is your guarantee to that??
i really think you should talk to your girl about it,
a problem shared, is a problem half solved 
you guys should be able to talk about anything, a relationship needs all the communication in the world to survive
comm'on you can do this?? the hunger comes, but for sure when the day breaks, it goes away 
if the ones practising distant relationships can do it, then of corse you that get to see her can. And if you do love her, then it should be her or no one else in your bed 
the real test of your love is now, be sure to pull through
