"You are welcome to join me," I like that best. Better than my old one, "You can come with me if you want." The first has more flow and comes off more inviting. Eh, teasing her like your little sister works like a charm on some and puts others off. Flirting is truly an art. Make sure you are in a decent to great mood or you might come off strange. Complimenting a woman's shoes or eyes I find is best, they hardly go anywhere without either lol Don't sweat too much over it is my best advice which you found out quick If you want her, she is yours for the taking. I wish you good luck!
Live your life the way YOU desire