I ask girls their bra size and other questions? Is there something wrong with me?

One, you don't go around asking girls their bra size, that is a very personal question, and girls choose to share that information with whomever they want to, not just any random boy that asks. Maybe you should find a girl with similiar interests, instead of just looking at the most poular or hottest girls. But, get to know the girls instead of just their bra sizes, find out what they like to do, their interests. you will have much better luck with the girls if you do. Girls worth having want a friend not just someone who wants their body.