Everyone uses their own rules, it is whatever you find comfortable. I prefer not to neg any more, if you come across as rude, it can be a DHV togirls since you feel confident enought to not care. Or it can be a DLV since you come across arrogant. It all depends on the mood, i think when learning to stay away from negs though. Just stick to DHV and teasing.
A few of these "negs" aren't though. A neg is a back handed compliment. "I like your shoes, i think my nan has a pair." "Where do i recognise you from? Your that girl from the tweenies..?"
If you can keep a straight face while saying it, and then come to a little smirk it will work well
P.S. the post above ^^
Does she give you IOI's maybe she knows what you are like but likes that about you? Just need to get across that if you find the right person, you would be faithful. Or maybe just plan a date that is really special, mlow cost, but just effort. It might work better then being vunerable.. I think it will de, but up to you
If you live alone or can organise the house to yourself, invite her around because your going to take her out. And just get a fire going, candles around your living room, a picnic blanket on your floor and some wine and cheese on toast or something.. Tell her that you have prepared a very special meal, and bring out the cheese on toast
It is just a fun, low cost date. That she will remeber.