Is this a normal feeling to go through?

[pomtzu]

I really hope this is due to the fact I don't have a job or anything to keep me busy during the days - and it's causing me to overthink on everything.

This probably has a lot to do with it - that - and the fact that now you have a totally different life than you had in college. In school, you knew what you would be doing every day, and you had direction. Now, you just seem to be floundering and not knowing from one day till the next, what life is going to bring each day. Unfortunately, you are not the only one going thru this - so many people are in the same boat - and this horrible economy just makes it even worse. I believe most college grads go thru the same as you, at least to some degree. Hopefully that great job will come along soon.
Maybe you could find something to occupy your time until you find a job - like doing some volunteer work a few days a week. And try to understand what your boyfriend is going thru seeing you like you are now. I think he probably just wants the old you back. I'm sure it's just as tough on him as it is on you.
I hope you can soon find yourself, and that things will start to look brighter for you. Good luck, and keep us posted.