I had an ex with whom I am still in contact .
As soon as she married she realised it was a mistake, that she loved & wants me to get back . I love her too can't stop thinking about her .
How can she move out if this inseparable bond if marriage , & in India families are orthodox beside she being married she is also of a different caste.
Please some one suggest some noteworthy advises

I strongly advise you to think with logic not feelings as it's a big problem when a life partner can bounce back and forth with other partners do easily. Chances are she will dump you yet again for another. That's doesn't make for a happy healthy life, nor a happy marriage.

She is just using you for a way out of the mistake she is in now. She is married so you should NOT be in contact with her any way.