I love her she also loves me i.e she always looks at me attractively but when I approach her she didn't talk at all... this thing continuously happens for over 6 months

How do you know she loves you if you don't speak?

Just because someone looks at you, it does not mean they love you.
If she has never told you so how do you come to the conclusion that she does.
How old are the two of you?

I don't know how to start & make with a girl to fall in love with you..?

You cannot make someone fall in love with you.

You can become friends and see if anything develops from there.

Be yourself. Get involved in activities that you enjoy and will give you a common ground for talking to people (not just females.)

https://www.askmehelpdesk.com/dating/love-her-she-also-loves-me-e-but-when-approach-her-she-didnt-talk-all-576475.html

Is this the same woman you posted about earlier?if so, why do you want to make her fall in love with you if she already apparently loves you?