I know, I put up a wall too, just for this reason! I dont really fall hard but every relationship I go in most of the time I want it to last forever, and it kills me when it doesn't. I kind of know the reasoning behind the last breakup, (even though he blames me) and I know thats not true, but its out of my hands and I can't convince him otherwise. Nor is it worth my time to try to. I just wish things would have turned out different. I always think "maybe this time I got it right!" blah