Omg yup, I totally relate to what you said. I comforted my mom all the time, I slept in her bed all the time up until around your age. She had a lot of "adult" conversations with me, before I was emotionally ready to fully handle them, although I felt mature at the time. There were some other things about the lack of boundaries that were rather inappropriate, in retrospect.

It may seem harmless, but really, it does have an effect on you, your development, your preferences as you get older. Your jealousy is just one symptom of this, and I totally understand where you're coming from with those feelings. I don't mean to alarm you though, because the first step to getting off that track is being aware of the impact this kind of relationship can have on you. How at first, it may seem like a privileged position to be in. But ultimately, it can be really harmful :/ (for example, I've learned to really enjoy comforting my loved ones. But that's where I get my sense of self-worth from. Perhaps as a result of how I was loved, not for simply being a child, but for the role I was able to fill, the function I was able to fulfill.)

Anyway, you're totally welcome to PM at any time if you wanted to talk about this more. Like I said, there are a lot of really good self-help books out there, such as "The Emotional Incest Syndrome," and "Silently Seduced." I have both books, and I'm planning on reading them this summer when school is over. So yeah :) I don't think you're gonna be screwed up. There is hope. I think being aware of it is the first step to healing yourself. Anyway, it's definitely a tough spot to be in. Please be sure to look out for yourself and take care of yourself! Your emotional well-being comes first!