Before deep diving into the issue of vegetarianism, it is important to remember that the path of yoga is a spiritual path, and the practice of yoga is a spiritual practice. It is designed that you have a teacher and a tradition that you follow. With that premise, the issue of vegetarianism becomes very rich and dynamic.
Whether we like it or not, vegetarianism is part of the spiritual path of yoga. The Hatha Yoga Pradipika goes so far as to outline which foods are best eaten by a yogi or yogini. Perhaps your teacher teaches vegetarianism in your lineage. That does not mean however, that there is an obligation to choose vegetarianism. It depends what your goals are on the yogic path, and what best fits you at a given time. However, being vegetarian is considered an essential part of an advanced practice, with the aim of helping propel the practitioner to ever deeper experiences of self-realization and samadhi. Here it is important to be realistic about that for which you are striving. If you have read the yogic texts and understand vegetarianism is a traditional part of yogic philosophy and culture in India, and your teacher teaches vegetarianism, but do not want to become vegetarian for one reason or another, it can be very convenient to dismiss the ancient tradition of vegetarianism in order to mold yoga practices to fit our lifestyle choices, culture, and in order to remain an "expert", absolving us of responsibility for our choices. However, I would like to offer a different solution, which is not as satisfying to the ego, and that is choosing not to become an advanced practitioner, and taking responsibility for that choice. We can be a basic, regular ol' yogic practitioner, while acquiescing and taking responsibility for our decision not to be vegetarian or advanced. "I practice yoga, but I choose not to be vegetarian. Vegetarianism is an advanced practice, and I have chosen not to practice this traditional part of the yogic path at this time" sounds much wiser and more enriched with self-realization than "vegetarianism in the yogic texts is harmful absolutism and you don't have to be vegetarian if you don't want to be".
What at are your thoughts on the issue of vegetarianism? Where are you on the path?