Baseline Weird

In a relationship (marriage?), 2 people with different personalities and upbringing have to be together held by a bond called love. What makes them stay (a while or longer or forever)? What makes them grow apart? Will the love ever be strong enough? Once the love fades will certain couples be compelled to stay due to a sense of duty?

My personal theory is that in a parental bond (mother/ father to child) it remains unbroken & solid, especially between mother and child. Child to parent may not be as strong. Between siblings less strong perhaps. Between husband and wife- least strong. I can't picture myself ever being in that trusting long term relationship ever again. Why? Maybe I just can't make someone happy ever again.

Do I self-sabotage? Perhaps I do. 

He is a wonderful person who seems very comfortable with his current life. I can't impose. I do not want to. He has to decide what he wants to do with me. I do not want to wait indefinitely. Nor do I want to keep pushing for something that he would rather not commit to.

Whatever it is the outcome, there are no regrets. We have experienced love and did the best we could. That's it really. Whatever happens next will happen.