Thanks very much for all your answers.
@Dreamline: Yeah, it's really tricky to find out why I may be attracting this.
Been thinking about that a lot.
Here are my thoughts inspired by your postings:
Hm, I think it's not about that I'm thinking I'm not "good" enough for a healthy girl. hm... well I got some low self-esteem issues some years ago, but never since.
I don't know, one similarity of those girls are the big dark eyes with a kind of strange expression of sensitiveness or shyness. Maybe it got something to do with a protective instinct. They give me the feeling of being their only strong hero, their shoulder to lean on. Like a cool 80's action hero rescuing the hot babe and driving with her by the side into the night.
The other thing which came to my mind is that all three of them are not that kind of "society conform" type of person. They got exceptionally style of dress and look, taste in music and so on. Just like me
It's weird. The down thing is this kind of bleeding inside. This sad feeling of doing everything for her but not being able to help her. It's up and down.
Getting only just so little back to keep hanging on. Very similar to the relationsship with the borderliner. @Coffesmurf: I think you know exactly what I mean...