If you ended a relationship and realized they didn't go looking for another person, didn't go out partying, but instead started running, training, taking care of themselves, and distancing themselves from everyone so they could overcome themselves... I'm sorry to tell you that they truly did love you.
And I'm sorry to say you let a very good person slip away, one you won't find again... not even in another lifetime.
Out of respect PLEASEEEE do not tell me about people that I am no longer in contact with. I do not care about them, what they do is none of my business. I have my own life and I am very happy with where I am.