As other answers have indicated, you must divorce before getting remarried, otherwise your new marriage is invalid. But I think they have oversimplified it and this could very easily turn bad for you.
Since you are on an F-2 visa, your presence in the US is dependent on your marriage to your husband...and dependent on his F-1 visa. An F-2 visa is not an immigrant visa, once it is invalidated, you are no longer allowed to stay in the US. You could technically be deported at any time. You are not allowed to work, how will you support yourself?
If you were to divorce and remarry, there are 4 options.
- Marry immediately and file to adjust your status without leaving the country.
- Marry immediately, return home, and file for a spousal visa.
- Return home and file for a fiance visa, then get married after approval.
- You could apply for asylum
I'll be honest, each of these options is going to be difficult. The first 3 of these require that your new spouse can prove that they can support you financially. They will trigger extra scrutiny on your new application because you came on an F-2, and within less than 6 months, started having a relationship with another man. It also sounds like you may be from a MENA country, which will make it even more difficult, as will a big age difference with the new spouse if there is one. If you make it to the interview, they are going to ask a lot of questions, and you are going to have to convince them you did not plan this out to get into the country. Each carries risks and it's going to look like immigration fraud. Worst case scenario you will get stuck in your home country married to 2 men because your home country doesn't recognize divorce and you married another man. What are the consequences for that in your home country?
I don't think the Violence Against Women Act will help you because your husband is not a permanent resident or citizen, but I could be wrong. If you were eligible, you would need to prove your spouse is abusive.
There is something else you may be overlooking, is your current spouse aware of your plans? You will need them to cooperate to even have a chance (unless you take the asylum route). If they refuse to cooperate and simply return back to your home country and abandons their visa, then what? Divorces take time (especially if they are uncooperative). If they withdraw from school and return home, your presence becomes illegal and you are supposed to return home. Without him here, it could easily take well over 6 months to finalize a divorce. You cannot guarantee you will be able to stay in the US after this is done either. This process will be very difficult and would likely need a lawyer that specializes in immigration.