It's a good thing I was born a girl, as this kind of weakness is still OK in the "weaker sex", but would mean humiliation for a boy.

In general, yes. However you just need to find the correct people to be around. If I had any other friends than the ones I do I would not be myself.

Sometimes I feel the feminine bits and pieces (high heels, bras, short skirts) as fun and sexy.

Agreed! :P