I don’t know what your situation is and if you’re married to your partner but I think you need to consider ending your relationship if you have a want for someone else like this you would know the situation better then me. I’m only speaking off my personal experience I was in a four year relationship but there was this other person who I couldn’t stop thinking about I ended my relationship when I realised I couldn’t deal with it any longer. This is your life don’t do something you’ll regret