((((((((Simon))))))))
I'm sorry you are feeling so used by everyone, and feeling like its hard to trust people because of that. You are such a good and caring person and you don't deserve any of that. I think that maybe people can "see" you are a caraing person, and thats why they feel like they can trust you with their problems .. but the problem is, that they don't actually see what they are doing. Sometimes people are just so concerned with their own problems, or just overwhelemed with their own life that they aren't as aware of what they may be doing to other people. IMO though, if Julie did just discard you so easily, well you deserve SO much better Simon. I know that doens't help right now, but just try and be patient, and the right person will come along.
I may not be in the exact same position as you, but i do know what it feels like to be used as a pon, or a toy. I don't have all the answers, but just keep being the good person you are. These people in your life that are hurting you ... well in the long run they are hurting themselves. One day they are going to look back and realise all too late that they are alone. That the people they use to have in their lives aren't there anymore. That they don't have an honest person like YOU anymore.
I'm sorry if i haven't helped at all ... but just know that i understand how you are feeling, and you're not 100% alone in this.
Take good care,
Jacq