When I talk to girls I often run out of things to talk about after a very short time, anyone who can give me some tips?

anyone?

literly anything. most of the time it doesnt matter what you say its how. Now it is always good to have intresting things to say but if your approach, body language and inner game are good it will take a lot of the pressure of of you.
Take a look at getting some DHV stories our dumb questions that you can ask her. Take a look in the routine section and get some canned material til your comfortable enough to go in and improve.

Comment on her clothes, hair, style, your hair or, anything. The problem when it comes to conversations with women, is that guys now treat them as something special.

If it's something you might talk about with your girlfriends/boyfriends, then talk to her about it.
Why? Because if you don't, your not being yourself. Your already changing who you are by how you hold a conversation. And if its normal for you to not say anything for a bit, no problem, people think that great conversation are continously back and forth. In my opinion I think its where you can hold silent for a minute or two just to appreciate her company, and for her to do the same.

Remember it's not all about her, you HAVE to enjoy yourself as well.

Remember not to spend too much time just talking about her or else she'll get the impression that you're drooling over her and your just another guy in line trying to hit on her. Play some joking negs on her, this shows that you're comfortable with her and that you're not just like every other guy drooling. Talk about something that makes you interesting: do you like to travel, do you sing, or volunteer at a local shelter. Then ask her if she shares the same interest, if so let her expand on it. If not, ask her what she is interested in. And then when she tells you, try to relate some of your own experiences to hers.

Hope this helps,
~GQute

Tell a story! anything. "omg, the other day I almost got into a fight with the street sweeper man in the city." As Ace said, it's all about the delivery, have some charisma. So long as you say it like it's interesting, it is.