Divorce after wife ran away

No.  Without getting a divorce, you cannot remarry.

Even if we didn't had court marriage???

You cannot marry another person during the subsistence of your marriage.

Whether your currtent marriage was registered or not but if it has been solemnised properly following the religious customs and rites, then it is a legally valid marriage.

If you still go ahead with your proposed marriage then it will be considered as a bigamy offence  and the punishment will be imprisonment for  7 years or more for this offence

Thankyou so much sir ..

The offence under section prohibiting bigamy in not a cognizable offence. In any non-cognisable offence the aggrieved party should file a case. In order to file a case the person filing the case should have a locus standii. The only person having locus standii is your first wife. Is she likely to file a case against you? If she is not likely to contest you can marry a second time. But in due course if any property right or any other rights of a wife comes up your first wife can make claim. There are many Radhakrishnas, particularly in the film industry, because the Rugminis do not contest or make any claim.

There's is a high chance she will file case against me.. once she left i tried to convince her to comeback.. but she is not willing to comeback.. and she is asking her marriage expenses for a mutual divorce.. what should i do??

You can file a case for restoration of conjugal rights and next file for divorce if she does not respond.