Nothing is easy or pink when it comes to relationships. There are so many ups and downs and do many grey areas... When something inside you tells you that things are not what they used to be and you tend to deny it to hide the truth, it will emerge no matter what sacrifices you'll do to make things better. Explore your emotions and try to understand what is that makes you unhappy and what is causing the feeling of guilt. Don't allow it to get deeper. Love yourself and accept things for what they are. Sending you a big hug!