I'm currently catfishing a guy who I now actually like
May I ask how it all started?
I started the contact with him by connecting over my estranged father.
If you really like someone you should tell them the truth. It is wrong to lie to other people and carry the lie on for so long.
If that's what it takes to be with him then fine.
It also doesn't mean he will automatically be receptive to the truth. He may break up with you once he finds out.