Help me! his wife keeps calling my phone telling me to stay away from her him?

i have been seeing this married man and his wife found out about us. now she is threatening me if i dont leave her husband, but i love him so much and i cannot let him go. she found my number and is now leaving dirty messages. she even came by my house and slashed my tires. now he is blaming this all on me!!! what do i do? she is crazy and why wont he leave her now that he sees how crazy she is? so confused and lonely