The short version is yes. It is possible to do a binding spell on oneself.
I definitely think that in this case binding at all is ill advised. Binding ones own feelings has a huge number of risks and nearly an infinite amount of ways in which it could go wrong. Consider this, binding means to hold it back. So lets suppose she runs into this ex-boyfriend at the Starbuck's and through conversation the seal is broken, releasing all the romantic feelings that have been binded together that long? Needless to say that would be bad.
How about using an improper seal? Instead of binding her romantic feelings for the ex she simply binds her romantic feelings completely. Romance has a greater depth then many people realize. It is often believed to be something shared exclusively between lovers. Is that true? I could see the loss of such feelings destroying families, friendships, love lifes, who knows how many things could be destroyed.
Binding oneself is a hot topic. I go against the curve and believe this is a relatively safe practice. Just be sure that you document how to break the seal so you don't end up having to figure out a counter spell. Also, timing the spell can be helpful, aka it will end on the second full moon... whatever it be.
Emotional depth is one of the sources for a magickian's strength, binding any part of oneself is denying that you are in fact you. I could understand it for darker purposes or to protect oneself from the influence of sinister forces, however, the events in which self binding should be used are very extreme and tend to lead to severe suffering, especially when they are performed improperly.
Allow me to explain a little story about self binding. When I was a young and foolish magickian I often dabbled in unstable arts. I had tutors of these particular arts and once I began to approach their knowledge on the subject they opted to destroy me which is rather fair as I was studying for the soul purpose of destroying them and every other person I felt deserved it. Not a pleasant life at all. The unstable arts are based on having very unstable powerful emotions to drive the spell into being. Think of a scale with positive and negative emotions balancing one another perfectly. This is the balance found commonly in sane people. Well, I needed more negative emotional strength to cast these unstable afflictions on my enemies. The easiest method I saw was to bind the good things. I bound my joy, my happiness, my love, my calm nature, my inner peace... all of it at once. I intended to murder my mentors of the unstable in single attack. Little did I know they left something out of that particular method and all I managed was to fill myself with the darkest of natures. You see, after I only had unstable energy my very thoughts left me, my desire to kill my mentors went with it, I just wanted more unstable energy. It was an addiction to all things unpleasant.
I lost the ability to smile. My unstable nature made even non-magickians attack me. It went on for several years, long enough for me to forget how to cry. I would just collect darkness, day and night. I was weeks from suicide, I even carried a knife with me, so I could murder myself whenever I wanted. I met a very strange woman. She knew exactly what I was, I was a soul being swallowed by an inner demon. I craved nothing but unstable energy and methods to destroy myself even more. She could tell that simply by looking at me.
She cursed my dark nature with a trick. A simple method to view ones inner force. Once I saw mine I wanted to learn more. I studied her ways more and more, She claimed that more power could be found in stability then instability, as stability has both stable and unstable energies working in concert. This made sense to my corrupted mind so I studied stability. Little did I know she was teaching me how to destroy my own binding.
It took her 2 years to assist me in breaking my binding. Once I did, and my stable nature returned, I was drained completely. The only power I had known was in fear, anger, hatred and suffering. Now I was stable, but I knew nothing of good things. She left me to discover that for myself.
Thats about as bad as it can get. The unstable nature of self binding leads me to believe that while a safe practice in theory, it will destroy over a long period of time.
My advice would be to live with what separates human kind from demons, emotional depth. It is how we so consistently defeat them.
Hails to the free,
Silence