I've been reading this thread with interest. I'm wondering if you would be interested in some observations from someone who has a different approach to the world.
First, you've all been discussing "treating people how you'd like to be treated". Have you ever considered that this is flawed logic? Why is it flawed? Because we're not all the same and we all want different things in life. Sure, everyone talks about wanting to be loved and respected - but if you break these concepts down, the definitions will vary from person to person. For example, look at the five love languages: one person may show love through physical contact but their partner shows love via compliments.
I would suggest that "treat people how THEY want to be treated" is a far better path to a good relationship. Of course, you must only accept appropriate behaviour in return.
Also, there's been discussion about being a 'pleaser'. Do you know that this whole pleasing thing can go too far and end up incredibly boring? I know my hubby dumped the woman before me because she was too much a 'pleaser' and I know I couldn't date someone like that either.
Thing is, it's lovely for you to say "you've had such a busy week, let me take you to dinner at x this weekend". But if you're the type of pleaser who only wants to do what makes me happy, then it's too much. You see, I want someone who has opinions, even if those opinions are different to mine. I want to have give and take. I want someone who will say "no" to me. I want someone who can plan and make decisions without deferring to what may make me happy. Most of all, I don't want to hear "whatever makes you happy dear".
In short, it's lovely to make someone happy....but not at the expense of your own opinions, wants and needs. Then you just become really dull.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.