The worst thing is that the breakups were unforeseen and completely caught me off guard.
Yes, Aesir, I should have put this in my original post. I never saw any of the breakups coming although if we had an argument over the weekend I would dread her phone call on Monday evening because she liked to breakup at arm's length as it were. I think that geographical separation made it easier to do so. If we were physically together, her abandonment fears might be triggered.
I guess that if I was fearing her call then I had developed abandonment fears of my own (through projection?).