I mean, I love humanity deeply. So I feel for me to be happy I have to do something to help humanity.

But that’s literally just because I want to be happy.

Like Stirner said, paraphrasing here, “because I’m an egoist I want to help those around me. Their happiness is mine, and their suffering as well. I help them only to help me”. Truly conscious egoism is to serve humanity. It’s our burden as humans. We were born intrinsically linked to a whole universe of people.