My boyfriend has a friend who has romantic feelings for him and I want him to end the friendship.
Is your boyfriend aware of the feelings the friend has about him?
Yes, she has told him about it directly.
If she is getting pushy about her feelings towards him, I think that it is okay to tell him that. If you do not know this for sure, you should not have him end it. It could be that she is just confused about the way she is feeling.
Who knows, maybe the three of us should all hook up with each other.
The three of you hooking up has the potential for bad drama so I think it's best if your boyfriend speaks with his friend about their true feelings and intentions and if she is truly pursuing him then he should end contact with them out of respect for you. She needs to understand that he's in a relationship and she should respect that.