Ash,
You know my thoughts on this. You took time off to work things out. I have 100% faith in you that, you will go back,and this is really what you want to do with the rest of your life. Like I've said in previous post, that ever since I've known you, you've wanted to be a medic. I personally think that you taking a semester off was good, simply because I know the things your going through right now, and you would be too pre-occupied with them, and wouldn't be able to give your schooling 100%. So by taking a semester off, getting your problems worked through, then when you go back you'll be able to focus more on your schooling. As far as getting out of EMS, I think you should slow down, that way you don't be come burned out. And if I know you, I know that when you're at home, or at the firehouse, and the tones go off, I know that your the EMT, that takes it..
So my suggestion is, let some of the other EMT's run some of the calls. That way it will help you remember why you started this "hobby" to begin with.