As you move forward on your spiritual path, you will frequently come in contact with other beings who will act as your spiritual trainers, or sparring partners. You create these people to assist you with your growth by lighting you up and highlighting your issues. Each one will be your "nemesis" for a time. They are created in order to light up your "pictures" and for you to light up theirs. These relationships can be extremely powerful healing tools, but you must be conscious with respect to what is going on in the relationship if you are to grow from the experience of knowing them.
Although it may be hard to see at times, the relationship with your nemesis is always an intimate one, and there is some level of love involved. The person that you just "cannot stand being around" will light up your core issues and in turn you will light up theirs. Any person that you have a lot of charge around exists in your reality for a reason, these may even be close and loving relationships.
Consider the person you are most in resistance to in your life right now. Do not judge this person as good or bad, but rather reflect on what the dynamic of the relationship is. It is important to stay neutral in order to determine what you are attempting to learn from this particular nemesis. It is important to get out of resistance in order to receive the learning. Nemeses are always here to teach us. Perhaps they are teaching you to own your space, or for you to move through competition issues. Once you can recognize why they are present in your life, then you can celebrate and honour them because these people are an important part of your journey.