You can feel like a mental patient, but that doesn't mean you have to act like one.
Acceptance is the only way out of hell.
People with BPD are like people with third degree burns over 90% of their bodies. Lacking emotional skin, they feel agony at the slightest touch or movement.
Radical acceptance rests on letting go of the illusion of control and a willingness to notice and accept things as they are right now, without judging.