Feminine body. I be happy about it?

I am a boy (aged 19) & I expected to have a muscular body. But instead I am turning more like a woman. I don't know why but my body kind of looks like a woman with wider hips, big butt, thick thighs. But I have a slim belly. That gives me kind of a womanly figure with 29" waist and 41" hips. And moreover my chest looks as if I have breasts. I have very big breasts (mom says I am C cup and I need to wear a bra? Should I?)and also big dark nipples that kind of becomes hard and sensitive at times. And my body hair is also less and skin is kind of smooth. It looks like I am gaining weight like womans do. I think maybe I will become fully have a body like my mom in couple of years. Is it a good thing to become like my mom and should I be happy about it? [I kindly expect detailed answers of the questions PLEASE]