<human>: Can you give me the gist of the text in a nutshell?

My parents do not approve of my relationship with my boyfriend. They don't trust him, like him. They do everything in their power to let me know he's a rotten egg. 

It hurts so much hearing them talk this way about my boyfriend. They don't have any reason to. He is a sweet well behaved man. Overly friendly. He's well known in my little town and a lot of people like him as well. 

I tell my parents how much I love my boyfriend, but they keep telling me I need to get out of this relationship. The relationship between my parents is getting worse. How do I talk to them when they don't want to listen? I don't want to lose my boyfriend nor my parents. 

I want to write them a letter as a last resort. But what do I put in it?
<bot>: The relationship between my parents and I is falling apart because of my boyfriend they hate. I don't want to lose anyone, how to deal with this situation? They don't listen. How do I talk to them?