Oh yes-I cant definitely relate. I had an ex who had told me his ex had contacted him by facebook a night that I was away with my friends. I got suspicious because of the circumstances surrounding him and his ex. Eventually I caved and read their facebook messages which were not good. I am a very honest person though and told him this, which of course he was mad about.

I don't know the exact details surrounding your situation...but in relationships you need trust. Without it you cannot have a good relationship.

And you have stated that you cannot be alone. This is something major that you should deal with. Everyone needs independance, and you should not have to be with someone else in order to be happy. You should be able to be by yourself too. Good luck with whatever it is you are going through!