Your vulnerability doesn't define you. It's merely a spoke in your multi-dimensional wagon wheel.
If you can't accept and make room for your vulnerability, you can't really love someone. To love another deeply, means to NEED them emotionally.
The opposite of attachment, is detachment. Many detach from their lover or partner in dozens of little ways. They mentally make them seem less important or in some ways defective, so they don't have to care as deeply.
This is a defense against getting hurt by feeling too close or bonding with someone. It keeps one safer from the potential of devastating loss, should the other die and leave them behind.
How many people do YOU know, who compromise or 'settle' a bit for someone when they marry, because living (however long) with their Perfect Love, is too damned scary? Emotionally whole, healthy people incidentally, consciously take this risk.
Can you guess how many humans have the exceptional courage to choose a mate they never get to bitch about? Precious few.