As long as you're being honest and respectful of others, that's really the only obligation you have. It's ultimately up to them to be in control of their lives, including their emotions. If they are fragile enough to be shattered emotionally after one date, it's kind of a big personal problem, for them.
I try hard to remember that the number one thing I can do to serve the world around me is be responsible for myself. When I run around trying to fix/help everybody else and forget to care for myself, I don't end up getting much accomplished. I just get worn out and turn nutzoid.
I nice people!!! I hope things improve for you and you find a wonderful, sane, balanced, cool guy who does, indeed, adore you.