what I have learnt through my life is that when I met people that Im instantly attracted to it doesnt mean that it has to end up in a sexual relationship, it may be that God want to better you as a person and/oryour life in some way by their by their advise, their knowledge, or better you in talents if you have the same and visa-versa but not for emotional and physical attraction which u must push aside if that happens, you marraige is an asset before God no matter how bad your marraige is, If your spouse still want to keep being married to you and want to remain with you and you remain with her then before God to the both of your credit work it out, before God Almighty stay faithful to your marraige, It will better you as a person, If I left my husband for another man when he has been good to me, I dont think i want my life to be judged by God as it says in Hebrews, that person has no business interfereing in your marraige regardless of how you feel about each other