always act masculine around women. women do not, i repeat, DO NOT like feminine behavior on men. that happy dance may be cute to some girls, but trust, it isnt cute to most. and even the girls that its cute to, may find it funny at first, but if u continue doing it, her attraction to u will decrease. the girl in ur situation cant control her natural instinct. she likes u, but, her instinct is telling her "this is not a real man. he cant protect me. he acts like a child".
i was with one of my exes years ago at her friends house. one of the dudes at the getogether was telling a story about some girl. and as he was telling the story, he attempted to be funny by mimicking how the girl talked. in doing so, he made body movements that was purely feminine. and within milliseconds of him doing that, one of the females in there (i think his aunt) told him "dont ever do that again". that;s not cute! it was like her natural instinct to reprimand him. and as an observer, i saw the whole thing and it was not cute on him at all. little sh1t like that can drop a girls attraction for you, FAST! for this dude, i guess he felt comfortable doing that because he was at his family's gathering.
in ur situation, OP, i honestly cant blame your girl. and u shouldnt. she was brought into ur life to make u a man. i strongly recommend u reconnect with this girl and get ur head straight. do experiments on her (without her knowing). take her out, handle everything. dont ask for her input. just surprise her. u do this for a week or two, and i wouldnt be surprised if she hits u with the "I think im falling in love with you". women love dudes who handle things and all they have to do is get dressed and show up. its called courting. (dont take a mile out of this and end up in a relationship where u allow the girl to do nothing while u carry the burden of the relationship!).