People enter into a relationship to get to know the other person, they enter into a commitment based on their love, and they seek happiness in life. Whether happiness revolves around marriage and kids or a significant other to spend life with. All relationships have problems. A couple married for 35 years did’t hit several bumps in the road. What makes their relationship last while others don’t? That is a tough question to answer because there are a lot of factors. Cheating on your spouse or significant other is just one factor in an unhappy relationship.