I don't have confidence in myself. Fault of society. Sexism.
I don't know how how to reject advances. Fault of men. Sexism. (BTW. How is giving anyone's a t-shirt with your name a sexual harassment? I could totally imagine a guy giving one to another guy and other than being rather lame gift, not be a big deal.)
Obviously being a guy makes it so much different, and your road to becoming an engineer is very straightforward. You're always overconfident, never shy, noone ever is mean to you, noone ever bullies you, society melted you to be a perfect human being capable of anything you desire.
It's amusing to see how woman raised in America (especially CA!), where everything is super sexist-conscious, and sometimes plain rigged in favor of girls (eg. how many boys vs girls gets drugged for ADHD, as they naturally can't stand still in the class?), still find a way to blame everything on sexism.