How Do I Stop Missing My Friend ?

You can be in touch with your Indian friends with social media. Create a group in FB & WhatsApp.
Make sure you ask her how was the weekend, how kids exams. Simple things.

Pls make friends in US, I made friends who are non Indians, they are simply great and you can get the diverse feeling. But I felt all women are alike appearances decive, it's the same.

I suggest you to make friends here. Sometimes I find our Desi people are little judgemental.
I stopped being over friendly my dh's Friends, co-workers spouses, or my child's friends mommies. I made my own friends. Also keep intouch with your college, school friends in US. That helps a lot.
Friends ship should bud within. I hope you will find friends....
Take a walk in park, join gym, yoga or take up simple classes. Language classes.