Work Friend: An Office Must or Someone You Can't Trust

I wish I would I would of read this before I became close to my co-worker. We hung out with each others family, our kids, friends, etc. I even introduced her to my neighbor at the time. They hit it off and I wasn't allowed to hang out with him anymore because she got jealous. That created so much tension but we/I did get through it by accepting how she was. Then, I was promoted and it got even worse. I'm not sure if it's just women in general that don't know how to appreciate friendship or if it is because we were just work associates and I mistook it for more. All I know is that I would never trust or try to get close to any co-worker ever again. It's just not worth it when it goes wrong and work begins to affect your off time.