Type 4's are really, really interesting when it comes to relationships. Personally, I've found that fours have the potential to be exceptional therapists from their ability to dive deep into both their own and others' emotions. They also tend to love quite passionately and value sentimental moments and memories more than other types.
Often 4's will talk about how others hurt or reject them, and how they were a part of toxic relationships. As a 4, I have definitely been exposed to many unsavory peoples in my life (although that really isn't because of my type, it's just life) and have been a part of relationships that were ruined by misguided and disturbed people. But, as much as I hate to admit it, I have also been the toxic person in a relationship. I have ruined perfectly good relationships with my own violation and it's difficult for me to understand what I did wrong and why I did it. Part of the reason I think I ruined some of my relationships is that I wasn't satisfied or felt like they didn't fit my very specific needs at the time. I tend to push those people away, even though they may be perfectly good people, and that ruins a perfectly good relationship. Along with my 3 wing, I have found that sometimes I find myself avoiding relationships with people that might make my image look bad, for example, not hanging out with unpopular people. I've also lost friends to envy and jealousy, wishing that I had things that they had and convincing myself that they were unfair in not sharing it with me.
Are there any type 4's out there that want to talk about how they ruined a relationship or how they can sometimes make a relationship a little more difficult for the other person?