Being polygamous or monogamous is entirely up to the individual. However, I still believe that only the Gods can be polygamous, because we humans cannot handle intervening emotions. You can have a look at
this thread.
Apart from that, although it is difficult to heal from a relationship that ends badly, all wounds heal in time. You should give yourself time to do this and focus on yourself. You can do High Priestess Lydia's
emotional healing working.