Why is it legal for someone to steal my GF?

If I steal from a store, I'll get caught and have to pay a fine, do community service, and/or go to jail.  Same if I steal from a neighbor.  But if someone steals my girlfriend, how's that legal?

Women are not property, nor are they vending machines. You can't keep handing them cash and expect them to pay out in sex. You are confusing a girlfriend with a prostitute. Prostitutes are rented property from a man in a feminine-colored hat named "Slickback". Don't fuck with "Slickback".

For the record, no one stole anyone. She chose to betray you and commit to Jihad. For her insolence, you should purchase a weapon and proceed to murder her and her defiler. The uncleanliness must be wiped from the planet. I don't care how many children she had, none should be spared.