<human>: Can you condense the text into a few key points?

Me (30F,with my boyfriend (27 M) of 1.5 year)

We have been together for a year and a half. Initially this was going to be a casual relationship because I have 2 kids and we are both in grad school and wouldn't be able to merge our lives any time in the near future. But we fell in love and decided to enjoy while it lasted. 

Three days ago we actually broke up. I've been anxious about having an expiration date and how I would feel breaking up after growing stronger for a whole other year (when he graduates and leaves) so I figured I would do the wise thing and end this already.

Now The pain of not having him even though he works literally 3 minutes away from me is excruciating. This was the best relationship of my life, even knowing there was no future to it and i keep wondering what if he's right, and we can enjoy this amazing thing we have for another year? 

And to add on: I kinda feel that my doubts were exacerbated by PMS anxiety. I regret breaking up so badly. 

What should I do? Break the no contact and tell him I regret breaking up?
<bot>: Regret breaking with boyfriend even though it was probably a wise breakup. Now I want us back, what do I do?