Hj wiiltimeheal,
Why does she get that happiness and I am still searching? Her and the replacement have been together for a year.
I agree with hopealways, BPD is a pattern of chaotic and unstable interpersonal relationships. Your ex is searching for the perfect r/s and looking at all of the good things at the beginning of the relationship, her part time self begins to fail and she'll project her failing part time self and see her partner as all bad and devalue her partner.
She has feelings of emptiness, self hatred, shame, anger, low self worth, anxiety and often there's a concurring clinical depression, thoughts of self harm. I think that it helps to step back and look at the bigger picture when we're thinking about our ex's and that they feel happy.
She may be searching for happiness but BPD is a pattern of chaotic relationship. Happiness is something that you create, have you thought about what makes you happy? It could be something you may want to discuss with your T?