He pretty much admitted it himself, what else do you want? Or do you feel that because he lies all the time we should not believe him at all, even when he incriminates himself?

I'm fairly confident in declaring Trump guilty of that, this is not a court of law, it's an internet forum and the standards for both are different. In fact, the standards of proof for criminal law are different from those for civil law (see OJ), and I think it's a bit much to require the standard of proof for criminal law to apply to a forum discussion for someone who is on the record as stating the does exactly that which others claim he did to them.