The answer depends on how you are as a person. Generally, you want to work on imbibing two qualities: 1 being able to be at ease with yourself, 2 willingness to be straightforward about how you feel towards a girl.
They are always looking to get somewhere, or do something, or get something. If you have this attitude when you are talking to an attractive girl, she will most definitely get that you are trying to get somewhere with her! So, how do you make yourself into someone who is at ease with himself? The right kind will change the quality of your life — it will make you less tense and unsettled.
Getting into the groove of it is difficult though, because it takes enormous discipline, especially at the beginning. But it will be worth it.
The other thing you can start doing to cultivate a sense of ease is to start expressing your emotions without judging yourself, or fearing that others will judge you.
If you are angry at someone, express it. Feeling sad? Express it. Want something? Tell it to people. We start to believe we must hold back our anger, contain our misery and hide our happiness. When you have stoppers in all your emotional orifices, how are you supposed to be at ease? Why do people become uneasy with themselves? Because they pay too much attention to themselves! They think the whole world is watching them, commenting on them, and judging them.
