I heard about your situation, and my sympathy goes out to all involved.
Having a little cry over it is not a bad thing, and if thats what you feel like, then thats what you should do.
The knot will untighten and go away with time, it might not feel like it but it will.
Spending time with family and friends is a good idea, lets you know there are others out there who also care about you.
From the little I heard about you, you sound like a really cool person, and Im sure you will have no trouble finding someone to hold again once you get back to Uni. Take a wee breack from relationships first, but before you know it you will be able to chaulk this whole and I must say rather complicated relationship up to experiance.
Broken hearts really hurt, but they are an inevitable part of growing up, and in the end will make you stronger.
Hope
both of you feel better soon.