My boyfriend killed out dog and i want to take him to court for it.

Am i wrong? We were fighting and he took a knife and stabbed her 😢 she was my bestfriend my baby my world. Yes he gave her to me as a christmas gift 3 years ago but he had no right to kill her . i am furious i broke his car windows because i went crazy i love animals and i would never even think of hurting one. He wants to press charges on me because of his car i know i was wrong but when he said she was only a dog it made me go insane i am so hurt right now