There are many ways to go about getting a girlfriend.  The first thing to know is that not all girls are the same.  Your approach will need to be tailored to the specific girl you fancy.  That said here are some tips you can keep in mind to get a girlfriend:

1. Put yourself out there.  Join clubs or other gatherings of people that share your interests.  You may find the girl of your dreams through shared interests and your growing network.
2. Be confident.  If there is a girl you are interested in, don't be afraid to ask her out to coffee.  The worst that happens is that she says "no" and you are no worse off than you started.  You can't lose something you never had.  Proceed with caution if rejection could lead to awkwardness in a friend group or in the workplace.
3. You are going to get rejected.  It's a simple fact of life: not everyone is going to be romantically interested in you.  Take the rejection gracefully and don't beg or lash out.  Hold your head up and move on.  Sometimes dating is a numbers game.
4. Improve yourself.  Pick up hobbies and work on yourself.  Make sure that you are the kind of guy a girl would want to be with.
5. Take care of your appearance.  You never know when you might meet Ms. Right, so always make sure you look presentable.  This doesn't mean always wearing a three piece suit, but make sure you are keeping good hygiene habits.
6. Be yourself.  It may be tempting to act like something that you're not, but this won't build a solid foundation for a long term relationship.

Hopefully these tips can give you some guidance for your future romantic endeavours.  Is there anything else that I can help you with?
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