Your boyfriend has laid out a boundary: he does not want to be with a partner who watches porn. While it may be a boundary I don’t agree with, he is entitled to have it.

You now have to decide what is more important to you. The ability to watch porn, or being with this particular person. No one can make that choice for you, only you can do it. If this is a compromise you are unwilling to make, it means that you and he are not compatible as partners.