If the legal definition helps you, in our state, what happened to you would be defined as sodomy. Oral intercourse is legally a form of sodomy. In terms of which crime your boyfriend would be charged with, it would be either criminal sodomy or unlawful sexual relations (in my state). Further, in our state, you would be considered a victim of kidnapping as well. Your boyfriend transported you to a different location with the intention of facilitating his crime of sodomizing you. I am so sorry that this happened to you. I hope that you are getting the help you need to come to terms with it.

ETA: I'm sorry that sounds so clinical. I really am not cold or indifferent to what you are feeling. I was trying to provide you with the definition because you said it would be helpful, but I don't know how to make the printed words convey the depth of my sympathy for you.