Am I Losing My Empath Abilities

I have known about my empathic abilities for about a few months to a year. Last year I was a great empath. I could feel a person's emotion from way across the classroom. The feeling is heightened when I come into physical contact or I am very close to a person. I remember one time we were sitting in class and my teacher was talking about something and I zoned out. The next thing I know I feel sad and one of my classmates started crying. She was sitting in the back of the classroom and I was in the front. I felt her sadness and I almost felt like crying. Later I found out that both of her parents were dead. I'm still wondering if I really sensed her emotion. I can also slightly see the aura of living people and only some animals (I have no idea if this has to deal with my glasses that I wear). Not too long ago I think one the past Sunday around 11:45 I was lying in bed and my sister's cat was moaning. After my brother told the cat to shut up and knocked her off his bed, ten seconds later I have this feeling and all my hearing stops working and my vision goes black and white. Something told me to look over the edge of my bed and I did. I something that later that night we found out to be a baby cat. Before I called my dad into the room. I stared at it. I was still seeing in black and white, but I saw a whitish aura around it. I couldn't see it's aura after I turned on the lights. I have also been able to see a few things before they happen and sometimes it happens in my dreams, but I can't control it. One night I dreamed of sliding into a base and breaking my leg. I was really nervous because we had a world series tournament the next day. When it came to the game, I stole a base and broke my ankle. Though it was I year ago I remember the dream so clearly. Back to empathic abilities. Ever since the new year started I began to feel my empathic abilities start to fade away. Right now I almost feel as if they're gone. I can still see auras and see the future, but don't have empathy anymore. The lack of emotion makes me feel almost alone. I tried to feel the emotion of my friends, and it works sometimes, but others I only feel my emotions. Usually at lunch when I go to the court for recess, I feel and overload of happiness and now I feel nothing. Once I felt the sadness from a girl who had just gotten dumped. Even then in the whole court of kids I felt her emotion inside of me. When my friend was angry I couldn't feel his emotion, but when the end of the day came I felt lingering anger from him, but he was then happy. I can still feel emotions through contact though. A friend of mine would always poke me in the back and say "stab". Whenever she does she usually laughs and walks away either giggling or when I get her back, I feel a rush of excessive happiness. Usually if that happens on a day I don't feel happy, I have a better mood afterwards. I use to use this ability so nobody could sneak up on me, but now I don't feel their emotion until they're right on me. I've even tried to use my abilities on my crush. She was a few feet away. I didn't feel it at first, but I felt how mad she was. I was only five feet away from her when I tried this! I've even tried this on the teachers at my school. I don't feel their emotions until I'm next to them. It's not even a strong feeling either! Can anybody tell me why I'm losing my abilities. Also if could tell me how to control and channel my powers (I can control them half the time) that would be great.