Would you trust your boyfriend if he made friends with his ex girlfriend out of spite?

I have a problem accepting the fact that my boyfriend friended his ex girlfriend out of spite after we had a fight. We have had plenty of issues, arguements and fights over this. She has even contacted me and told me she could have him back any time she wants.

She is the type that changes her boyfriends like her underwear, she has a husband, she has a boyfriend, she flirts with other guys constantly and she already played enough head games with my boyfriend and I just can't stand that he wants to be friends with her again after everything she has done to him. Even after I said I didn't like it, I think its absolutely disrespectful that he would friend her after I said I didn't like it.

So I digress, would you like it if you boyfriend refriended his ex girlfriend after you said you didn't want him to several time?

Would you trust him to do the right thing even after he has lied right to your face?

Would you like your boyfriend being friends with the woman he said he will always love and that he wanted to marry?

He claims that he doesn't want her, but he has given her numerous chances, and frankly he has already lied to me in the past, disrespected me by friending her and who in their right mind would want to be friends with their ex girlfriend whom they know is a hoe?

I don't get it, UGH