The initial euphoria of being in a committed relationship is an attractive feeling, but it is not a permanent feeling. Ideally, love mellows to a comfortable affection, but over time, feelings do erode. John Buri, a professor of psychology at the University of St. Thomas, states that people do not simply fall out of love. Instead, it is a process that happens over time and through mutual neglect. Identifying the signs of a partner falling out of love is the first step towards resolving the problem.
Track how much time you actively spend together. If you live with one another, active time spent together is often supplemented with time spent simply in each other's presence. Spending time together actively is a sign of a healthy relationship, and if you are not doing it, this is a warning sign.
Think about who they talk about. If your partner is talking about new people he or she has met and you have not, this might be a sign of them distancing themselves from you, either on purpose or subconsciously. At the very least, it is a sign that you may not be on the same path socially anymore.
Watch for moodiness. Does your partner seems very positive one moment and extremely despondent the next? Unexplained mood swings are a sign that your partner may be having doubts about your relationship.
Ask where they are going when they leave your home. If you notice that your partner is spending more and more time with his or her friends rather than with you, or if you have become a less desirable companion than their friends, this is a sign that there is a problem in the relationship.
Ask them where they see the relationship going. Be direct about your inquiries and find out what is going on in their heads. The conversation may be painful, but it opens the way to an honest dialogue about what you have shared together.