Several things wrong with this:

A) I could lose my job if this happened.

B) I am 35 years old and Eren is fresh out of training and is 15 years old. I'd rather not be charged for rape if I had sex with a minor.

C) He is just my respected subordinate, kids. I don't like him like that.

D) He's still trying to figure out the world, let's be honest here, and I would prefer to be with somebody who actually has their shit together.

E) But at the same time ... have you seen how great he cleans?