I guess I do not understand what it is you are looking for. I mean, I thought I did (as in you wanted your marriage), but then I am not sure when you post things like this. I don't think you see how negatively you come across. My first thought in reading your post was "OUCH!"
My next thought was this: You post all the time about what a jerk he is to you. Then you go on to say, "I wouldn't help him if he was a jerk to me." SO, which is it? There is no right or wrong answer here, I am just wondering what it is you are looking for. It doesn't seem as if he has done anything lately to "deserve" your help. I am glad you weren't keeping score when he needed you, though. The right thing to do was to help him. (And to not concern yourself with the cost and how he was going to pay it...good job here.)
Again, I do think that it was kind of you to help him out. But, it seems you DID have expectations ("If I broke down I would expect him to help me"). This may happen some day, and he may not come through for you. This is why you need to work towards being as self sufficient as possible and to find other means of support in situations such as those, just in case.
I am not trying to get on you here, but really....do you seriously see nothing wrong with saying that if he treats you like crap he will get the same in return? How does that help anything? Why not be the bigger person here? I am not saying to just roll over and take bad treatment, but there is no reason to do the same in return. Just ignore it and get on with your own life and the things you enjoy.
HSS, I don't want you to feel as if I post to you to attack you. I am just trying to point out to you what your posts sound like. They sound so negative and sometimes just hateful. I know that you are hurting, but you need to get to a more positive place in your life. I say this not as a criticism, but instead as some well meaning advice.