This happens to me too. I find it usually works against me because instead of being independent I quickly become almost "tied" to the state of someone else. I've learned to almost "block" this to a degree but when I do this people accuse me of being cold and selfish and my self-worth diminishes. And when I do give into it (i.e. with the last girl I did anything with) I've found, when relations end and the truth comes out that they actually didn't come close to knowing who I really was. Also people tend to project their own characteristics/traits upon me which pisses me off.