How ask the girl to be your girlfriend.?

[Been There]

This is how the emotionally mature and psychologically well-balanced people do it .. the people who actually have the skills to make relationships work:

Date her for 2-4 months.
Prearranged get-togethers, suggest activities, pay for any activities that cost money.
Slowly get involved physically. Start by touching her arm, holding her hand. Kissing her. Maybe next time do a bit more .. .always being aware of whether she is tensing up and resisting, or relaxing and encouraging. If you push her that might be the last time you see her.
Slowly get involved psychologically. Discuss things that matter to you, your values, your outlooks. See how well you two see eye-to-eye.
Also spend time getting to know her through her behavior. Is she kind to others, is she slow to take offense or feel hurt, does she let go of negative emotions and stay laid-back? How does she get along with family?

Over time, as you get to know her, you might find that you like her as a person.
If you two are still dating after 2-4 months, THEN ask her to be your girlfriend.

To ask her right off the bat is like a little kid playing "house". It is a fantasy and the more you buy into it, the more it will hurt when the reality bursts your bubble of make-believe.

You can ask all you want.
She can accept all she wants.
But until you two KNOW each other and have some kind of basis for BECOMING bf-gf, you are only playing "house" with each other, indulging in a fantasy. Unfortunately, fantasies can bite as hard as reality .. because we believe them.