The first thing you want to do is to understand that a huge number of people out there derive inexplicable pleasures from denying other people whatever that is that the other guys want.
If you march out into the world openly looking for a BF, the chances are that the people around you will try to see how far will you go to achieve your goal. So, openly looking for a BF will probably be an uphill struggle.
BFs are rarely found. They are mostly made over some period of time.
Declaring that you want a BF now will send a few guys running for the hills because they simply fear the idea of a ball and a chain.
So, lean back. Start meeting guys, go through dating, weed out the unsuitable guys, and focus on the guys who are a good, attractive BF material. Show them how their life, too, can be better if they boyfreind you.
Lots of work. A few disappointments, too. But usually, a very good end result