Not my most recent, but only one long enough noteworthy and can be said with certainty. Everything about me was perfect to her, even my flaws. The only problem with that is she thought I was TOO good and worried about me finding someone else. I guess you could say she was controlling, but not in a manipulative or hateful way. I personally felt she was out my league as well so for the majority of relationship (2 years), I'd address her concerns by showing her the feelings are mutual... all that lovey-dovey stuff. This gave her the peace of mind to show the same feelings back. Then I hit some hardship in life, insecurities grew, and I expressed the same worries back at her. We stopped showing love yet expected/needed it more than ever. Didn't last very long once it got to that.

Unfortunately, it was a messy breakup. But short--we cut ties completely and haven't spoken or even seen each other since. It's been a long time (~4 years) so I think we're both well past any emotional influence on our opinions of each other. I think she'd say something very similar to what I would say about her:

She's an awesome person and I truly wish her the best. We were very compatible and perhaps the breakup was a brief lapse of something good. We've ultimately learned a lot about ourselves and life in general from it, so it was for the better... including the messy breakup because it burned bridges that allowed us to do so. I'd love to talk to her again someday, but I'm not going to go out of my way. While I don't believe in fate enough to say something like "if it was meant to be, it will happen", one thing I have learned is that relationships--both romantic and platonic--should never be forced.