What Just Me said

Unfortunately, you've trained her to treat you like this by allowing her to do it for so long. Often when people are fed up with being passive, they switch to aggresive and tell someone to Get lost. You could do this, but I don't think you'd like that you did.

I'd write a script, then call her and say."X, I've been thinking about this for a long time. I don't feel comfortable with our friendship. I don't feel valued by you and I never have. I'm sorry if this hurts you, but I'd rather you not contact me again. Thanks." If she then loses if either through anger and tears, say "I really am sorry. I don't have anything else to say, so I'm going to hang up now."

If you'd prefer to do the passive thing, continue to not answer calls. Change you home phone number. When she rocks up, either you or your DH tell her it's not a good time and don't let her in the door. She can only take up 2 hours of your time if you let her.

GL and I hope baby comes soon.