Sparky,
At the risk of starting a war, I will suggest that you acquire a copy of a Catholic Bible. Difference is that there are more books in the Catholic Bible than most Protestant Bibles. Of course that may increase the divide between your girlfriend and yourself since many of the born again group find solace, comfort, and a place to leave their minds in other, more abridged versions such as the King James Version. That is not to say that the Catholic Bible is not abridged, it is. There are many arguments that at least eight of the original apostles wrote gospels, biographies of the man they knew as Jesus. I'm not aware of any Christian Bible which has more than four gospels in it. And you may find some striking differences between any Christian Old Testament, and your Jewish books, in name, number and translation.
On your question of where her quote is coming from, I've never seen it in writing, nor have I heard it with the usual attachment of chapter and verse numbers. I suspect it is something she is getting from her preacher or from her Sunday school teacher. I don't think it has any basis in the true sayings of Jesus or His disciples. Someone has already commented that it translates as Love me and my God and abandon yours. I suspect that such is the case. Incidently, I happen to believe that Jews and Christians, and Muslims, worship the same God, the God of Abraham, Isaac and Jacob. We just have different rites of worship. After all if we weren't worshiping the same God how could we be telling jokes like:
The rabbi, the minister, and the priest all died the same day and went to their heavenly reward. The minister got a brand new Dodge to drive around, and since he hadn't been well off in life he thought he was doing very well. Then one day he happens to see the priest driving by in a big Ford. Later those two were standing on the corner and the minsiter says to the priest, "Well I guess you were right. Your's is the true religion." About that time the rabbi drives by in a really big, shiny Cadillac with all the chrome. The minister turns to the priest and says, "So how does he rate that car?" The priest replies, "Well Jesus was a Jew remember."
I will also echo previous advice. You will probably be better off with a life mate other than the young lady posing your current question. In my experience such folks tend to be very focused on their narrow beliefs and intolerant of those who do not slavishly parrot their party line. A party line that I think is acutally incompatible with the teachings of Jesus.
On the subject of love, the part I remember being attributed to Jesus is: "Love God with your whole mind, your whole heart, your whole soul. Love one another as I have loved you." Paul has a long list of what love is in one of his epistles, letters. You have probably heard it if you have ever gone to a Protestant wedding. "Love is kind, love is patient, ...."
Editorialy. I think the Jews have it easier. They only have the Ten Commandments to define their relationship to God and Man. As I learned them the first three are: Only worship one God, don't take His name in vain, and keep holy the Lord's day. (Can we agree not to quibble on translations for the moment?
) The next seven are honor your parents and a list of don'ts for getting along with fellow humans.
Christians have it harder.
They have to give all they've got to God. In the spirit of the sports coach imploring the team to "Give it all you've got." Then Christians have to love their fellow humans as Jesus loved his disciples. He is quoted as calling them a nest of vipers. That's roughly equivalent to calling them a pack of rattlesnakes. Then he still kept trying to teach them how to get along with folks, and him. He showed by example that the poor, the blind, the lame, the sick, the sinful, and everyone else is to be treated with respect, courtesy, kindness and generally be nice to them. I can't speak for you, but I sure don't want to hold the door for someone, courtesy, who just yelled at me in the parking lot for getting to the good parking spot first, and I didn't see them. Yet that is what Jesus' message is to me. A lot harder than just not shooting them for shooting their mouth off.
So, you got a recommendation of what version of Christian Bible to buy, and at least one reason why; what my recollection of the wording of the book is; a recommendation to find another girl friend, and why; and what I take from the Bible on the subject of love. Also an old joke.
I think I, as a Roman Catholic, am in the correct religion, but I can't say you are in the wrong one. Both the Jews and the Muslims have a very strong argument against putting statues in their places of worship, idolotry. We RCs argue that we don't worship the statues, but the saints they represent, yet the argument is valid that praying to the saints for help could be said to be worshipping other gods. I think in many ways that the RC church has a severe cranial-rectal inversion problem on many issues, female priests, homosexuality, birth control, etc. But I think other religions have similar, and in some cases, worse problems. All probably becasue the religions are run by humans, and I haven't knowingly met the perfect human yet in the flesh.
Probably more information and discussion than you wanted, but I hope it helps,
Kelly