@Alicia Purple,
And that's four of us.
You need to concentrate on your studies. Speak with your professors or if there is a class advisor and explain that you had personal issues but you are working through them and want to reapply yourself to your studies. Explain that you are not looking for special treatment, but you are hoping for some understanding.
Then do what you said - reapply yourself to your studies. And maybe swear off dating until you graduate, so that you stop having these problems.