You didn't say both of you had the same counselor???!! Isn't that a huge conflict of interest??
The first thing you need to do is stop seeing that counselor. In fact, it might be a good idea to stop the counseling immediately. All it's doing is forcing you to relive everything over and over again, to someone (probably some uber-feminist wench) who clearly isn't on your side and certainly doesn't have your best interests in mind.
I know what you're feeling. I'm not going to tell you your feelings for the girl weren't real. You were clearly in love with her...otherwise you wouldn't have sacrificed the Camaro fund to save her life. I don't want to be one of those people that tell you "it's just hormones" because in this case it's clearly not. That's why it hurts so much when she rejects you.
When I was 19, I met my dream girl. She was Argentine-Italian, from New York, and she was gorgeous. She was the first girl that ever really took an interest in me, and I fell hard. We met at an Army ROTC summer camp in Kentucky and so it was the friendship that developed first, before the chemistry. That made the bond we had a hell of a lot stronger. A few months later, I flew to New York and we spent a very...shall we say, intense...week in her dorm.
However, long story short, she lived in New York, I lived in California. We tried to write each other and email, but then she headed off to Germany on a foreign exchange trip, fell in love with some rich German dude, got pregnant (then married), and today she's got 3 kids and still living in Europe. I was heartbroken. Even today, ten years later, I still wonder what might have been.
But then I think of my beautiful wife, whom I met in 2006. She's everything I ever wanted in a girl, physically, emotionally, and spiritually, and we're celebrating our first wedding anniversary this week. If she and the Argentine girl were standing side-by-side, and I could choose one over the other, I would choose my wife in a hearbeat!
I guess the point I'm trying to make is that as painful as things are, and as awful as you feel right now, and as much as you loved her, she was not the right woman for you. She didn't deserve you, and I think you might have realized that over time. There is nothing you could have done. If she didn't cheat on you now, she would have cheated on you later, maybe at a time when you had a hell of a lot more to lose in a divorce (assets, children, etc.) than a Camaro fund.
Trust me, you're going to find the woman of your dreams, and she is going to blow this one out of the water. You just have to be patient. This one is not coming back...and even if she did, would you really trust her again? Could you ever kiss her again and not think of that bald schmuck? Wouldn't you find that your love for her was a little less because of all this?
You need to focus on the most important person right now, YOU. Go work out, focus on your studies, touch base with the friends you had when you were single, and start living your life again. As long as you let yourself wallow in misery over this girl, nothing will change.
And hey, if you can't afford a new Camaro, what about a used one. You could probably easily afford a low mileage 1999-2002 SS or Trans Am. Those are awfully nice-looking cars, and a hell of a lot more fun to drive than some damn Civic.
Anyway, keep your chin up and just focus on the future. I guarantee you. Someday you will thank God that this woman dumped you, because otherwise you might not have met the person you're supposed to be with.