I do not think that you had a 7 year old loving relationship, so the question is moot.

I did read the entire post, and did notice the very frequent mentions of the word "love", referring in both directions.

However, those frequent mentions of the word "love" were not supported with any evidence of the presence of the feeling of "love" in either of you. I think it is good that you are not together, because you should not be together. It is hard to explain that to you, but basically, the OP is very cold, and although the feelings of hurt and insecurity (you even lost passion for exercise, which is truly unfortunate, as exercise is extremely helpful in combatting depression) do shine through the OP, the feelings of love do not. It is way too cold. I do not know if your depression is what makes your writing so flat, though; maybe you did love her but your depression disabled your capacity to convey the feeling of love in words.

Another thing that suggests that you do not love her is your mixing everything together with your underachievement. Basically, you are viewing what happened between you and her as yet another of your failures. Your failure with her makes you feel that you are an underachiever on the romantic front, just as you feel that you are an underachiever professionally. People who actually love somebody do not have that feeling. They might grieve it and be extremely sad when the person they love rejects them, but they do not treat it as an underachievement, as yet another thing they could have enhanced their resume with but were not able to enhance their resume with. So I do not think that you love her.

My best advice is to move on and stop being petty. When you start thinking about who did what - who talked to someone, who slept with someone, and for how many times, as if it mattered a bit, etc. - who waited for months and who waited for weeks, it becomes petty and you run the risk of getting mired in this pettiness forever. Shortandround/Shortandcute picked up on that when she reflected back to you how your expectations of the girl's behavior did not agree with your own behavior. Pettiness is, for one, an unappealing personal quality, and, for another, causes wasteful and unproductive use of your time.

I hope you can move on, focus on your professional life and fitness right now, and put off dating until better times.