You don’t take girls on real dates.
A date is a building block toward a relationship. If your building blocks consist of lame dates that inevitably center around alcohol and sex, you're not exactly sending commitment-ready signals.
Wooing a woman is important. It demonstrates that you're the type of guy who will put effort into a relationship, and it expresses that you think she's worth putting thought into.
Go on sober dates to prove you're charming sans whiskey. Take her on dates during the daytime to show her that sex isn't the goal, it's getting to know her that you're interested in. And while you're at it, introduce her to your friends. These are the things that silently signal you're long-term-material and convince her that you think she is, too.