It was very kind of you to help your H when he needed it. You did good. Unless, of course, you have some sort of expectation that this will change your relationship in some way.
No matter what happens with your marriage, you and you H will be in each other's lives for a long time. It is best for your children to see you two being kind to one another.
I wouldn't be me if I didn't take you to task on the "you scratch my back I'll scratch yours" thing. I hope you didn't actually vocalize that. It just sounds controlling and not in line with just doing things because you are a good person. HSS, never do things with the expectation of having the favor returned. That sentence just really bothered me, as I can imagine it would your husband too. If saying something like that is "more of the same" from you, I hope you will work on just being kind and leaving it at that. Some day you may not want to go out of your way for him, and that will be o.k. too. Just do what is in your heart (with no expectations) and you cannot go wrong.
Take Care, Pam
P.S. I never mocked you. I was just trying to help, and I just don't think that my style worked for you. Cat seems more like what you need. She is saying a lot of things that I would say, too...she just wraps it all in a lot more gentleness than I did. I really do hope the best for you.