Another ex problem....... Blah!?

Okay, my boyfriend and I are doing extremely well and have definite plans for our future. However, the problem is with his ex girlfriend. She says she has moved on, she even claims to be engaged. Yet, she calls me at work and just hangs up when I answer and she has even had someone else call me telling me that my boyfriend was cheating on me. (which I know to be a lie, seeing as how he is with me all the time.) She even calls him and blocks her number, when he answers, she doesn't say anything just kinda sits there. I have even answered the calls myself. She does this a few times a week. Just yesterday, we think she got into his voice mail on his cell and deleted the messages that my little girl had left for him. How do we handle this? Even though we KNOW it's her, we can't prove it. We love each other and just want to get on with our lives. We are sick of her trying to interfere in our relationship. How would you guys handle this? Thanks!

She is a total psycho!

He did change his password this morning on his cell.

oooooh! fun times.

well, changing the password as you did.

and just ignoring it.

though, when you ignore it, it might seem like it's getting a little worse at first but she'll eventually see that she's not bothering you and she'll move on.

EDIT: just in case it starts to get threatening, log and document every time she does it. date and time and what happened. this way, if she gets REALLY psycho and you are scared (like she's stalking you and stuff), you have documentation to turn in to the authorities when and if you take legal action (like get a restraining order or anything)

good luck! but i'm almost certain it will pass.