Brady I know all of this is overwhelming to you. The future you were planning for has been ripped out from underneath you. The girl you thought you knew and loved (and gave your heart to) wound up being someone who's a horrible person.
You mentioned in your first post that you're finishing school this year. You also said that you are engaged to this girl.
Instead of wallowing in this you need to put a plan in place to help you move forward and to get through this.
1) it's the middle of March so you have about two months left this semester? Take care of yourself (making sure you're eating, drinking water, and getting some sleep). Don't PISS this semester away. Brady please study!!! Put your head down and man up.....TAKE CARE OF BUSINESS!!!
2) Stop ALL COMMUNICATION with this girl (even if she reaches out to you (and SHE WILL REACH OUT TO YOU).
3) seek out counseling at your school. It's one thing to speak to people here at SI, but you need professional help if at possible.
4) Tell your parents (your family) and your best friend(s) what is going on. I have no doubt that these people love you, and Brady right now you need to lean on them. You have done NOTHING wrong here and you have NOTHING to be embarrassed about. Please confide in them as bottling all this is up is NOT wise. Trust me once you let them know you will feel like a huge weight has been lifted off of you.
5) You need to let your family and friends along with this girls family know that the engagement is officially off and the reasons why. I know this will be tough Brady but you need to do this. STOP PROTECTING HER BRADY. She hasn't been protecting you for the past four yrs. Nobody is going to think any less of you. In fact they'll be proud of you because they'll see you standing up for yourself and showing them that you are a man with morals and integrity. As for the fall out with your ex well Brady that's going to be something that she will have to deal with.
6) write a list of every horrible thing she has done to you (keep it with you--put in your wallet). When you start thinking about wanting her back pick that list up and read it over and over until you snap out of it.
7) get out and have some fun. Don't sit in your dorm room (or apartment) and wallow in a pity party for yourself. Get out with other classmates if even just to laugh.
8) exercise. Go for a walk each day and lift weights as well. The goal is to do things that will make you feel better about yourself and exercise ALWAYS does this.
Brady Rome wasn't built in a day and it's going to take some time to get through this but my friend you will get through this.
Don't look into the future right now as it will just be overwhelming. Let's get you through the short term where you can get through each day and more importantly finish up with school and get that degree that you've been busting your ass working for.
Brady as lifeiscrazy said "it's time to grow up" or "man up".
One step at a time Brady.
You were sucker punched by this girl. Pick yourself up, dust yourself off, and press forward. That's what life is all about. We all get knocked down.
Now the choice is up to you.....do you stay down and throw a pity party for yourself and keep saying to yourself "why me" or "why is this happening to me" or do you pick your ass up and take care of business and tap into the fighter that's inside of you.
GET PISSED OFF BRADY!!!!!
You can do this and more importantly you will do this!!