Should I join a dance class to try to match her ?
Yes, why not. If you want to match craziness then you should join but I say "vibe is the thing which is more important than craziness" and both of you are vibe.
Do you love to dance ?
In my university life, dance, dance and just dance. Teachers are making us dance on their fingers with the help of syllabus like ocean but I love to dance.