How can I see encrypted messages?

Glendahurd1981 wrote:

How can I see what my man encrypted

With permission and the encryption key, most commonly.

And if you are sufficiently concerned over a partner such that you are seeking assistance accessing secured messages, best contact a lawyer. This as unauthorized access to protected data can be considered a crime in various places.

If someone encrypted a message then they need to give you the encryption key or password, - depending on the app concerned.