Hi all. I have friend with each other for 3 years now. She is got married but she is totally changed. When I chat with her she not message me even she can message new friends. But before a week she chat with me just 2 minutes then she gone. I am confused cause she is totally changed. She doesn't keep up with me. What can I do?

People change, marriage, grad from school, moving all makes people change at times.

This happens a lot.
Her spouse may want her to only spend time with his friends.
She may be looking for new friends who are married and having babies.
There's a lot of reasons, and there's nothing you can do but find a new friend, sorry.

As she is married, she may feel uncomfortable talking to you, or may be she used to like you but after marriage she must have realized that there is no use to continue this friendship. So its good to discontinue with her...

Oh yeah, been there. I´ve had both girl- and boyfriends (yes platonic) who said to me; "my girlfriend/boyfriend/husband doesn´t want you visiting us, or doesn´t want me to hang out with you". As a single woman I would probably be a bad independent influence on them. And dependence is the key to many relationships, sadly. These people shrink down to nothingness and cannot make such decisions of their own. Maybe I would have influenced them to think of their own, godforbid. Find new friends who love you and wants to spend time with you even if they get married or have kids, such people DO exist! Good luck!