Marriage: Withdrawing Form I-130 for a F1 Spouse

Hello everyone, I have an issue related to Texas state.

I filled out an I-130 Petition for Alien Relative after I married my wife 1 year (she is F-1 student, until now). We used to live in an apartment together for 1 year since our marriage (I still keep the lease with her name on it), we have separated when I found out her cheating and dating with another dude. Now I decide not to sponsor her but I have a few questions.

1) She paid the tax in 2013 and 2014 really high so I can sponsor her.
2) I am financing a car under my name (she put the down payments but we've both paid the bills)

Biggest concern for 1&2 => Is there anyway she can file a lawsuit or harm me after I withdraw I-130 application?

Biggest concern => What is penalty if she uses my SSN to apply loans without my permission? I have locked my SSN with Transunion, fraud alert but I am still afraid.

Biggest concern => Will anything happen to me after this?

Please advise me if anyone has been through this situation and its consequence. Thank you so much.

Marriage: Withdrawing Form I-130 for a F1 Spouse