Did a breakup ever leave you completely blindsided and if so did it make it hard to feel secure in subsequent relationships?

[AliceGregory]

[MicahRaine]

Yes and yes.

I dated a girl for almost two years and was pretty close to marriage with her. I planned my life around what would make her life fulfilling.
Then on my birthday one year as things were coming together, she broke it all off because she "just wasn't interested anymore," and didn't give any other explanation. We stayed friends, but it definitely broke my heart.
A year later she apologized and told me the real reason she broke up with me is because she got scared of how committed I was to her, and that she knew I would have been good to/for her.
6 months after she said that I felt ready to date again, and then I began dating Raine.

It has made trusting Raine much more difficult, but fortunately Raine understands that and is able to handle it well.

[RebelinSteel]

No I have been fine with all my breakups, a number I have initiated.

[Nikki1989]

No, but I never had a bad break-up and I have remained friends with almost all of my exes.

[NathanDavis]

fortunately... no, didn't experience a bad break up before

[RHK36]

Yes and no to it effecting future relationships. Every relationship is different, so I rarely apply what I learned from previous relationships.

[Saggitariusdiva]

Not really