Removing yourself from unsavory people.... did I do the right thing?

I feel conflicted right now about the decision to remove someone from my life.
I know in one place the bible says "remove yourself from evil"
and in other places it says "dine with the sinners and share the good news about Christ" in a matter of words...

Well, I posted some stuff about this last week,
but my beloved Christian boyfriend has a younger brother who chose a girlfriend who is a very ungodly person. His mom cried about it for months.
He "ran away" with her and for a couple of years we all would think about him and pray for him, but didn't really have to deal with him or her.
Well, last year they had a baby (out of wedlock!) and still haven't married or become Christians. I didn't used to let that bother me because my boyfriend chooses Jesus and chooses to live a Christian life and its like "he is not his family, he is his own man" but there was a long period of time where he had to live with his parents and the boyfriend and his baby momma had come to stay for an indefinite period of time. The mother welcomed them into her home for the sake of the baby, but then in family arguments she would always take their side.
Because I love him and plan to marry him, I was around plenty to spend time with him and because he lived with his family at that time, I ran head on into this girlfriend and her ungodly, manipulative, angry, vile, disgusting personality.
Long story short, when he was finally able to get his own place again, he was overjoyed like you'd never believe. I'd had to deal with her just enough to get slighted a few times, and also witness her treating my man badly which made me flaming mad. I wanted to tell her about herself, but it wasn't the Christian thing to do.
So we parted company with them and moved on from his family's home.

They are all in a town 30 miles away, and he lives in my town again. We are happily in love. And I think his parents mean well (but don't always make the right decisions) so I try to maintain a bit of a relationship with them. However, I have this problem with myself where if someone hurts me, I can't just ignore them when they are right there.
I have to excommunicate them permanently.
And it's not just ex boyfriends.
My boyfriend and I have a joint facebook account. we can both log into it and we use it to share positive thoughts about our relationship, about God, and show pictures of our dates we go on, since we don't see his family a whole lot anymore.
This is supposed to be a closed circuit facebook just for (his family's last name) and no friends-of-friends or any of that. Well, baby momma was one of the friends on there. Her posts are always so negative!
So I talked to my boyfriend and he agreed it was ok to un-friend her.
The problem is, she lives with his parents because her man does... and he said that for sure this will make some waves.
They're all hypersensitive.

I'm just trying to keep the focus on God, and his mom loves to talk bible on there and I talk bible stuff with her and with his 3 older sisters and I just feel so much better without little brother's baby momma in the picture. She butts in where she's not wanted sometimes.
I also made a request that she not come up in conversations. The brother can, if it's a positive memory like from childhood, but not her.

I feel conflicted because though he agrees with me, his family wants us all to be buddies and I just don't see that happening.

I had a hangup for a long time with a girl here at my church.
She annoyed me to no end with her bragging about her married life, and I was a bitter single who didn't want to hear it.
I wanted nothing more to be miles away from her,
but we went to the same church and had some mutual friends.
It took years of stress being around her but finally, God helped me get over it.
The thing is, this girl as annoying as she can be, tries really hard to be a Godly woman and a Christian role model.
Baby momma on the other hand.... is atheist, manipulative, angry, negative, selfish and annoying.
I'm at a place in my life that I need to stay away from that sort of person.
I just don't see myself ever accepting her.
I tried (we both tried), but she ruined it by being impossible to deal with.

The ONLY way it could ever happen would be if she got saved, became a born again Christian woman and started acting like one.

There, I vented my piece.

If no one has anything to say against it, I am going to go with my gut and assume that I did the right thing.