Orgasm help!

Me and my partner have always had amazing sex! But a month ago he packed up his bags and left me. Within an hour he was ringing me to say he has made a mistake and wanted to come home. I was so hurt I distanced myself away from him until I could clear my head. My partner had a night out with his friend the night he left me. I told him to stay away from other lasses on his night out, if he wanted me back. It isn't something that I'm usually worried about, but I felt hurt at the thought he had packed his bags and left me and would be around other woman. There was numerous things he did on that night that I feel hurt about. He was with his ex girlfriend, he had a photo taken with a girl, he was hugging girls, he got a lift home off a girl, he downloaded snapchat and added random girls, he was checking girls out on Facebook. Not only did my partner do these things, it took me three weeks of questioning to get all the information from him and he lied constantly about it. I'm still not convinced he has told me the entire truth. Since my partners return to home, the sex is bland! I haven't orgasmed in over a month. Please help fix my sex life!