As a woman, how can my partner's pornography addiction affect me and our relationship?

Very seriously. U dont mention whether this is a m/f or same sex partnership, &u'll get diff answers from diff drs. However, sexual intimacy is very core to deeply committed relationships. Ur partner's addiction says he/ she needs sexual stimulation which is not you. It may be diff. If u both used porn to have a good roll in the hay, but if ur partner is choosing porn over u, both of u, but at least u need prof advice.