Sometimes when i stop girls that are walking during the short convo they eventually interrupt by saying "i have to go" or continue walking while i'm talking to them. When they do this what should i say/do?...Should i walk with them?

If you're doing that yad stop thing. Cut it out. It's shit. And maybe you need to work on the way you come across. weird/boring/annoying

This probably means you've messed up with the vibe somewhere: lack of a calm presence, running out of things to say etc. Just need more practice, you'll work out where you're going wrong naturally after a while. Anyway, I came across this video last week, which may also answer your question.

https://www.youtube.com/watch?v=Yr-e5qHb9bU

It could also just be life.

If a girl is walking somewhere & some random guy stops her, unless she's totally into him she's still going to be more concerned about where she needs to be or where she's going. Same attitude applies for those annoying sales/charity folk that stop you in the street.

Funny how PUA stops common sense mechanism from working.

Say "Okay" and move on and talk to somebody on. And later on you might approach again where she sees you interacting with others and see's your a cool guy.

Abundance mindset, plenty fish in the sea. You shouldn't have to chase anybody, especially if they are walking away and your on the negative scale in terms of value at that point.

Having said that there are some things that help circumvent this. Such as always try to approach from the front versus behind makes it harder to do this.

You are in a forum called 'pua'forum.co.uk

Try to be honest, precise and self-confident. Let her know from the very beginning that you like her personality. You can say something simple: I like the way you dressed up. And invite her for a cup of coffee straight ahead or ask for the phone number. The result is not guaranteed but it is 50/50, quick and obvious.

You haven't grabbed her interest, she wants to get away from you. If she was intrigued she'd stop. Often girls are not used to being approached but those first 5-10 seconds are crucial.

Warm, soft, relaxed, charismatic and confident are traits that will make a lot of difference