No Stranger to Shame
Right now, it sounds like you have done the right things. The fact you went out on a limb with that DHV spike shows that you have guts, and that's a quality that a lot of women look for.
However, there are things that can be improved on.
Your mindset on this is one titanic problem. Right now, from your post it sounds like you are too attached to this girl. Not only that, your die-hard attitude to getting her may hurt you in the end if things fail.
I learned another thing from Tyler Durden today, who specializes in improving your inner self to make you more attractive to game. He said that women find a man who is willing to take on shame than a man who tries to avoid it. To do something potentially embarrassing and shrug it off as if it was nothing is far more attractive than not being able to handle the slightest of failures.
In terms of your future game, here is my advice:
Continue to be playful. It looks like that right now you have caught her interest with how you are. Just continue to speak naturally to her in public, and tease her every now and again with a flirt or a neg.
Change up the conversation mood. Add some out of the blue stuff into the conversation. Hit her with topics and questions that she does not have a generic answer for. If you need some good ideas for what to start out with, check out the forums here for openers and conversation starters.
Make your text game spontaneous. Randomize your response time. One moment respond in two minutes, while the next you could respond in an hour. This shows that you do have a life and that you are not always at her beck and whim. It also adds some anxiety to her because she will be unsure of when you will respond.
Most importantly, DO NOT CHANGE YOURSELF. Considering how she laughed at you when no one else did, she likes you for you. If you change yourself for her, she will only see it as you trying to get at her. Continue to enjoy yourself and stand strong for who you are. She will find this far more attractive than anything else.
I'm not sure how things are now with her, considering this is a month old, but I figured that an unanswered question is worse than an old one answered. Who knows, maybe someone else will stumble onto this thread and find some useful information in it. I know I did.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X