Ego is me opposed to you. The only way to befriend ego is to become perceived by ego as part of it, because, by definition, ego is always self-serving. And always mean – always taking; and if giving then giving to take. This is why Buddha recommends compassion – it is the one thing the ego cannot truthfully do. But ego will always deceive. Ego can easily pretend compassion in order to receive admiration and approbation – from others and from itself (pride).
The more an entity unifies its various dimensions around a distinct identity or self, the stronger the presence of Otherness – whatever is alien and inadmissible to that self. If this Otherness is ignored or rejected then it will eventually destroy the entity. Instead I must open to that Other or Otherness, invite it in and let it transform my identity.