Tonight I am going for quick drinks with a buddy round the corner from where i met this waitress a month or so back, she gave me her email, i emailed her she emailed back saying lets keep in touch, i replied and losely suggested a meet up and she never replied.

I would like to go back tonight and see her at work and do some more ground work but without seeming like a stalker.

is just being confident going to be the key? Any ideas on how to open her up again?

I would certainly go up to her work again just make sure to have at least one friend with you. If she thinks you are only going there to see her, you will DHV yourself. Don't ever mention the thing about making plans over an email to her. She already knows you so just pick up where you originally left on in person and game her some more. Build more attraction so she won't flake on ya the next time you want to make some plans. Also, make her feel really good while you are there and then leave as soon as you hit a high note. Keep her wanting more. If you can make it so that she doesn't want you to leave when you are leaving it will work to your advantage. One last thing, quit trying to set up dates on e mail. It is so easy for a girl to just erase it and pretend she "never got the messege". Use your phone bro