I've been on and off with my boyfriend for two years, A month ago we got back together and it was perfect. he met my family and they LOVED him, but as soon as me and him started having intercourse he began to change. All he wanted was sex, he talked about sex constantly and it began to bug me so we talked about it and he stopped, and everything was back to normal. Then around two weeks ago he began to change again and started asking me for nudes. I've constantly said no but all it does is get him angry. More like begging and begging, and still the awnser remains no. I really love this guy and I don't want to lose him but I have no idea what to do. Please help.