I'm not sure if I would call it destiny or luck or fate. I honestly don't know what I would label it. However, I do think I agree with you. I believe that things are meant to be.
I believe I was meant to be with L right now. I believe that going through ex-T abandoning me lead me to T. And when my time was up with T, a series of events lead me to L. If ex-T didn't abandon me, I probably would have never been with T and would therefore never have found L. T helped me with skills and coping in order to prepare me for someone like L. Even L says that if I didn't have all my skills work from T, she probably wouldn't have taken me on full-time.
I believe the same about other aspects of my life. I believe that about people and events, that they are meant to be. It's also why I live my life with very little regrets. Each thing has a purpose.
I do think this is probably a more religious/spiritual take on things, so I bet many might not agree.