I don't want to be a role model to my gay nephew
Thats sad to hear. Why wouldn't you want to be a role model? Is it because your nephew is gay?
My nephew is always trying to be like me, I think it's unhealthy.
It can be hard to be a role model so you don't have to be one, but you should be supportive of your family. It is hard for people out there and family should be there for each other.
I just don't want to expose my nephew to my lifestyle. Being gay never works out.
Someone's sexual identity isn't their only defining feature. It's possible to be a strong male role model without having the same sexual preference. Just try being their for your nephew when he needs you and I'm sure he'll be grateful.