Empaths and narcissists are attracted to each other like magnets. It's weird. Maybe it's because they are two ends of the same spectrum. Both have problems with boundaries. The narcissist thinks that boundaries do not apply to them - they are a 'special case' and above all that. As for empaths, they say "what boundaries? - I want to be able to connect and commune with every living thing". So there is the nub of the problem. If you are an empath and you are living like you've left the door wide open to your house - don't be surprised if a narcissist walks right in and messes with your stuff.
It's obvious why a narcissist is attracted to an empath – all that deep emotion and 'realness'. What a great supply - and if the empath doesn't watch out, the narcissist will sort of colonise the empath's very being a bit like a fungus sends out sinuous strands of hyphae. What isn't often talked about is why the empath is attracted to the narcissist. It could be to do with the charming 'false face' and love-bombing that the narcissist will employ to win the empath's trust, but I think it goes deeper than that. Remember that empaths feel things more deeply and have a sort of sixth sense. They also have big, forgiving hearts. Perhaps the empath senses a darkness in the narcissist but thinks that with enough love and tenderness the narcissist will change. The empath will shine a light on the darkness – will heal it. This is a common empath fantasy. Another common problem is when the empath, due to a lack of self-esteem, takes on a sort of acolyte role and worships the narcissist (these are known as 'orbiters'). "At last here is someone I can adore," thinks the empath "and look how they love it so much." And so the intoxication (on both sides) perpetuates. But what the empath doesn't realise (at first) is that they are putting their love into a bottomless pit. The narcissist will happily suck them dry. There is no reciprocation - no real connection (which is something the empath must have to be happy). At best it is a one-sided relationship. At worst it turns abusive with the empath on the receiving end.
If you are an empath you will have to get really clear about narcissists or you will keep attracting them over and over. Understand that they are incapable of feeling the world the way you do. Your love is too big for them, in a sense. They don't understand it and certainly don't respect it. Your task is to grow strong boundaries and learn to love yourself enough to keep those boundaries strong. Keep yourself grounded so that you don't succumb to the flattery and love-bombing. Trust your gut and when you get a feeling that something isn't right - listen to it; believe it.
Remember it takes two to tango. It's a drama of a dance and you might be best advised to sit it out.