What is the difference between ego and self esteem?

A group of people is standing in front of you.

One of them approaches you and asks you to join them.

You agree.

Now there are two possibilities -

You don’t initiate any conversation with anyone in the group. You don’t laugh at their jokes.

All in all you just ignore each and everyone of them.

This is what we call ‘ego’ .

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You try talking with some of the group members but they don’t reciprocate with the same zeal.

You try a little more but end up getting ignored by majority of them and then you finally walk out.

This is what we call ‘self esteem’ .