I Can Feel The Energy Of Someone Who Has Departed

My name is Kyle, and I'm not really sure what to make of myself and what I can sense and feel. Just to start out, I'm your average 15 year old guy, you know, freshman in high school, loves to play football, and awkward towards the opposite sex. Other than the abuse of my father (may he rot in hell) and the death of my sister (more on that later) my life has been incredibly normal. Almost. No, I can't bend spoons or tell you what the future will bring. Sounding boring enough so far? Well, although I don't possess the powers of a Jedi, I do see dead people. And not in the omigawd-i-think-i-heard-something sort of sighting. It's more like every time I open up my mind or even just chill out to relax, I can feel the energy of someone who has departed, whether that be an intelligent ghost or some residual energy. And you know what? For me, that is nothing new, and certainly nothing I would bother to write a minimum 1500 character story about. But recently, I've been able to discern the energy I perceive more clearly, both towards the dead and towards the living. I know before I talk to someone what the conversation will be like (95% of the time), because of what energy they have (ie: happy, mad, anxious, etc) and, of course, what mood I'm in. But when I focus, I can literally see what mood people are in, by the aura surrounding them; I'll see a light surrounding the entire body, and it will be a different color and size depending on their energy at that moment. Like, every time I go to church, my pastor is usually surrounded by a white light, which can be huge and radiant when she channels God (amazing woman, the reverend is). And it isn't just as simple as that. Lately, due to a deeply religious experience and some healing, my paranormal experiences have gone from tame and "normal" (seeing shadow people, full body apparitions, having the dead give me short little messages like "Get out" or "Hello, my name is...") to way out of my comfort zone. Suddenly, I'm getting some contact from my little sister. And she isn't dark or muddled like the spirits I usually see. She's just very pure and light, and full of this really... Tingly energy? She wasn't an apparition, she felt like she is just made of this tingly energy. This is exciting, but extremely confusing for me. I definitely don't think she is a spirit like any that I've encountered before, because they all seem dark. My sister passed on after a nine month fight with brain cancer at the nine years old, and while her death was painful, it wasn't a surprise to anyone. So imagine my surprise when she appeared last night, after almost 4 years of nothing, with a message of thanks for my step-mother, whom she has never met. My mom doesn't see the dead like I do- I'll be pointing out a shadow person that's as clear as day to me, and she won't see it, but my sister has appeared several times to my mom before. Now, on the other side of things, my interactions with ghosts have become clearer, and I'm really afraid of what that might bring. What's going to happen when a dark spirit wants to talk to me? Advice? Oh, by the way, I live in a 300 year old house that is crawling with all sorts of spirits and energies. The Underground Railroad runs directly under my house, to top it off. So, it's really a manner of when, not if something happens.