Dood, I asks gurls to be my gf ALL THE TIME.
When they say yes, I take them on a romantics dinner. I usually make it myself... shrimp, lobster, or a good old pizza... with cake for dessert, of course.
Then later I give her a gold ring, maybe with a sapphire or ruby on it. And go on a stroll through various markets and just talk for a while.
Then I take her into the wildy and pk her.