Hi friends,
I'm in love with a girl for past 2 years and I've promised to marry her and she awaits that, but my family is deadly against it, so I may have 2 avoid her for them, can she sue case 4 cheating against me?

Not in the United States she cant.

And if you really love someone, you would not let your familys wishes get in the way. So if you can give her up for what your family wants it was not really love

No, she can't sue you.