Hi Timo, thx for the reply.
She has studied English Literature, so Austen may be involved

Though she is not heartbroken, but a heartbreaker: She lost attraction, went abroad to study, went on a sex binge, came back, broke up with him, slept with him, they came back together until she realized that it was really over.
I don't mind her cheating on him as this tends to speed up things in broken relationships and saves everybody involved the time which is wasted by clinging together. But I didn't like the "I was attracted, when he seemed unreachable and aloof and lost interest when he let down his guard". She had hunted him for 2 years and they had been together for 5 years, so I guess this will shape her view on relationships. I am not sure if she is really turned off by people growing close to her or if he turned into a pussy over the years, which may well correlate with the "letting down the guard" stuff. I've no problem with trying not to turn into a pussy but I don't want a relationship with somebody who sees intimacy as weakness - I would be better off with an affair that way.
Anyway, your point 3 ist crucial, thank you for reminding me of making certain, that the level of commitment is not slanted. I have always been the one to initiate activities, so let's see what happens ...