What does it mean when a person you thought you cared for says I'm not your keeper?

“I’m not your keeper” as I understand it means they’re not a parental figure, that you’re an independent person and free to do as you wish.

Personally, I would take it to mean that they owe me nothing and aren't going to look after me. I have to go out there and face the plains myself.
Even with close friends we can rely on them a little too much, they might start to feel claustrophobic by the relationship.

Bring them on here we need to hear their side of the story.

What did you say right before they said that?

Seems they probably don't care for you in the same way.
They may feel smothered or that you are clingy. Just a thought. It's hard to say without knowing more of the situation.

In what context did he use the phrase?
I mean there must have been some action or words leading up to this.

My suspicion would be that I am expecting too much supervision/support and they feel it’s unfair.

Whether it is or not needs a lot more context.

It means your partner wants you to accept responsibility for your actions, look after yourself and be financially independent.
I consider that a very good thing, since every adult should live like that. It's an aspect of emotional maturity.
I don't think anyone is ready for a committed relationship until they're capable of standing on their own.

If he or she is not your keeper, that gives you the freedom to be yourself, grow and evolve.
It's the best gift of love that any adult can give another.

Would you say that my connection is over now that my person that I care for currently has said that? Twice

To me that says "I'm not the one you need".
Possibly because he doesn't feel the same way you do.
Quite why that is, i suspect you both know.

Very rude behavior

Stings a little

It means just what you think it does.. It's not positive

Thanks for the insight.

Brutal way to speak