If you don't want to have to worry about your relationships, then you have to go out with guys who don't really care about you. That's another way of saying that you purposefully put yourself out there in order to make other people like you, as in you believe they won't unless you give them something first. That's like opening the drain and expecting the tub to fill up anyway. If that is what you are doing, then you are controlling the entire relationship process. I have known a few girls like that in my time, I call them "blackhole" girls, because for all the emotional input there is no output of commensurate value, and every new day is like starting all over again. That's a great challenge for a guy initially, but there's no fix for it, and then there's no guy, so on and on, as you say. You are not being stupid, we're all confined to acting according to our conditioned responses, and you might just need to "unlearn" a few things. I feel like there's alot more here, root causes etc, and until you can address those nothing much will change. I can tell you that in one case, the girl's self esteem was so continuously beaten down by her father that she lost herself, and so lost the ability to accept pleasure in another's company, devolving instead into physically abusive relationships wherein she could at least feel something. Don't go there.