Vanilla to bdsm lifestyle

So my wife has approached me a few months ago about living the lifestyle. At first I was like hell no. Then I tried to open my mind and I was like ok. She wants an open relationship which is all fun and games at first.

She has found someone to spank her nothing sexual though. But I have t been laid in over a month. She tells be because I have a bad attitude and I am not putting her first. But yet she goes and gets spanked by this guy. Which I don’t like and she nows I don’t like it. But whatever makes her happy. And in the mean time I am slowly drifting as an after thought in her head. Don’t know what to do. I am tired and depressed any suggestions.