My husband also had an affair during active addiction and also resented the fact I had asked him to stop taking drugs. He also sought the company of people who were also using or who were telling him what he was doing was OK We also never had any money although we both worked. We have two daughters. He is now 3 years clean and working a 12 step programme in NA. It took ages before any of the recovery stuff happened. Years infact….But now we have trust and he has clarity. He does love you. He just doesn’t love himself and is trying to fill a void with whatever, whether drugs, sex, attention. All selfish behaviour is a part of active addiction. Don’t give up hope. I really hope he finds recovery. In the meantime you look after yourself and your kids as best you can.