Need Advice :)

[srmom]

Okay, I am really struggling with an issue, any input would be appreciated.

My youngest son is a junior in hs, 16 years old. Over the summer and earlier this year, he dated a young lady from another highschool, someone he has known for a number of years as a friend, but their relationship got serious last spring. After a number of strange and stressful things took place (that I don't want to go into), he attempted to break it off. Well, to say that she hasn't taken it well would be an understatement. She has exhibited some really disturbing behavior since then...

My husband and I have stayed out of it, only counseling him to be kind, but firm in his wanting to end the relationship. My son has tried to handle it, but, it is getting totally out of control. She calls and texts his cell phone up to 30 times a day or more, and calls our house phone repeatedly. She now has started showing up at our house and walking in the open back door, univited and unannounced. It is very upsetting to my son who really doesn't know how to handle it. He has tried being nice, he has tried being mean, nothing works, and the behavior is becoming more and more obsessive.

Yesterday when I came home from work, she was at the house. I hadn't seen her in quite some time, and when I saw her last night, I was alarmed. It looks like she has lost a LOT of weight (like scary skinny). I know through the grapevine that she has had issues with anorexia in the past, and frankly, I am majorly concerned about her mental and physical health. She was crying and apologetic that I found her at the house. I told her that she needed to leave and that the constant phoning and showing up was not helping matters, that she needed to give my son space, and that maybe in time, they could be friends again. The whole scene was really kind of weird (hard to describe).

Anyway, my husband and I are struggling with calling her parents and letting them know what's been happening. We don't want to get involved, but whatever my son has been trying has clearly not worked. I'm kind of nervous about calling, I don't know them well, having only met a few times. What do y'all think? If this was one of my college aged kids, I'd say, "you got yourself in this mess, now get yourself out." but, these are kids and my son is in over his head...