Watch out for those red flags
The end of a dysfunctional relationship cannot be blamed on one individual. It takes two to tango and it certainly takes two to disentangle. It is quite common that when people are madly in love they do not care or even want to take heed of some of the things that can possibly lead to calamity. If you notice something about your partner that does that does not sit well with you, do not ignore it. It could later drive you apart.