You are now going to get a little advice from a 43 year old guy who works in NY, manages guys your age and has been through the mill. I am currently working on saving my second marriage - ugggh.
Here is the good news... YOU ARE NOT MARRIED!!! If you are having these kind of problems before the wedding, there is a good chance your marriage will be a disaster.
When one of my guys asks me if he should get married I tell him to examine the following:
1. Does she have a good relationship with her family?
If yes --- good - she will want that to continue with a family of her own. If not, be careful.
2. Does she drink heavily?
If yes -- not good. Be careful. When you have issues, which everyone does, she will hit the bottle.
3. Is she a "career" woman?
If yes -- be careful. This can create a lot of issues within the marriage once children arrive.
4. Is she a big spender?
If yes -- be careful. She may self-medicate via shopping sprees.
5. Is this the woman that you want to raise your children? Will she be a good role model for your children?
I am not being sexist, we can develop the same list for a man. These are things that you should consider before getting married.
ALSO.... NEVER PUT YOUR HANDS ON A WOMAN. Regardless of the situation, if she called the cops, you will get arrested.
I cannot tell you what to do, but you need to be very careful.
The two of you also need to start growing up. Stay out of the bars, it will only lead to trouble.
Give her space, take some time off, hang out with friends and then figure things out. If you go dark, she will most likely come back to you. You are probably the only stable thing in her life.