You can make live-in relationship with any unmarried woman. This is not crime.
Please note that live-in relationship is legal if and only if the girl with whom your doing it is unmarried.
Avoid any divorced / married girl and look for any good unmarried girl.
Please remember divorced girl might have 498A background.
Please don't make any evidence of second marriage like -
a) Second marriage certificate.
b) Any evidence that proves that the second marriage has been done by the Hindu religious rites (e.g. invitation cards, marriage photo, any eye-withness etc.)
After that, keeping your girl friend in your motor bike, drive in front of her :-)
She will understand what she have lost ;-) Cheers!
If child born in this relationship then also no problem. Enjoy your new life.