How much possessiveness is too much in a relationship?

When you dont let them be themselves n watch out for everything

About this much 👌

Any at all.

Personally, in my opinion, possessiveness has no place in a relationship at all.

If the effect of vasopressin passes and there's still possessivenes, that's much.
(Vasopressin is also known as the sexual possessiveness hormone)

This much:
https://www.boredpanda.com/husband-bachelor-party-wife-christian-rules/

When you lose yourself in the process, and they lose themselves

When all you have left is them

When talking to another a person of another sex drives your partner mad

When visiting your relatives feels like you can't even breathe.