To think some people sabotage good relationships because stability feels undeserved?

[FearOfGood]

If you don’t believe you’re worthy, you’ll ruin what proves you wrong.

Yes, subconsciously. Have a look at attachment theory and how anxiously attached and avoidant get triggered by things which make them behave in certain ways that push away stable or secure love. So interesting. Would recommend the book ‘attached’ on this. Changed my life.

Yes I think it is true that some people do either run away from or sabotage a good or promising relationship because for whatever reason it makes them feel unworthy or unsafe. Its a difficult one because people often will say if they really liked you they would make it work or "he's just not that into you" and in reality people can be very complex and saying the above is just a way to get closure from a situation where it isn't really available. Most people really struggle with lack of closure and so negating the nuance in these situations is a way of moving on more easily. Having said all that the upshot is often the same that there is no viable relationship and so I can totally understand why people often prefer to flatten the situation out to a black or white answer out of utility.