What could these strange dreams mean?

My dream I had was the MOST vivid dream I have ever had out of my 17 years of life. So I will tell you the parts that I remember in the order of which they came from.

1 - My girfriend (This isn’t my girlfriend in real life, I do not know this girl) and I (I was very different, it wasn’t my body, but it was me in mind, and I wore black and red ornate armour.) were at a clothing store, looking like it was near a beach resort. We were laughing and stuff, having fun.

2 - The dream went to another scene were I was in a sewer with my armour on, and 1 part was in cartoon form. Another man came to in in amour and asked me some directions, I pointed over with my thumb. And some grime or a dead rat splashed against my helmet. (Note: The time period is 2006, why am I wearing armour?)

3 - I was walking around in school, strangly I was in my own body! Like a smaller version of me, and I was in the esaphagus, and a black lady with her black husband said “More black people should be in the olympics.” and I said, “Amen.” I walked down my troat and saw the back of my teeth, then my body vomited me out, and I guess I dissappeared because it didn’t show what happened to me after all of that. I started walking again in the school hall, students didn’t care (now I am in goth style clothes with some long torn dark cape) and I was looking evility at a teacher who was freakin out big time the teacher ran into the bathroom, and I went to class, the teacher tried to convice people that I was possessed. So, I was sitting in class, I did a little bit of work, then the dream switched over to another scene.

4 - I was on a fieldtrip, or, something, I am not sure, but a few parents were there and a lot of kids. There was a room with a HUGE frozen slide, the room like like walking into another arctic world, snow, and etc. and now I looked about the same as I did in the class room. 2 animals were eating something, I picked them up and slid them down and the children loved it, because the animals were like ah I don’t care but they didn’t talk, they to me, were just stupid. Then one animal, a bear a HUGE white bear, I picked up, and it was eating a giant piece of metal and it was very mad, and the children were scared, and I was like “Got cha! Hahahahaha!” and I put the bear down, and the bear just sat there. I walked along the slide and looked under where a room was, I found my girlfriend with another guy who I knew in real life. (This guy is a complete asshole to myreal life girlfriend, and he’s my real life girlfriend’s ex-boyfriend.) So my dream girlfriend was like “I don’t care yeah I am cheating on you.” I went crazy. everyone but 3 strong men left, and my dream girlfriend was never to be found, so I was back in my armour and we went in the tunnles that were connected in a few different ways. (Note: The tunnles, and everything in the room were frozen, or made from ice.) 1 man went each way through the tunnel. I was back in my armour thing, and I killed 1 by 1 until the guy I knew in Real Life (RL) saw me from the back and started freaking out when he saw his friend died by a chain saw I had, then I sliced that guy in half.

5 - I went to the store and saw my Dream girlfriend and I was like what the hell? and she’s like “Whatever.” So I guess my DREAM girlfriend was a whore because she wore a see through top erotic dress that stopped at her waist and panties everywhere she went, weird… So I was like ok fuck you bye.

6 - Later that night I went in the store again, I saw the store keeper, an old nice guy, and someone I knew in RL who was my friend. I gazed at the moon wondering “Why?” and then I entertained myself throwing a toy ball on a string into the air, and threw it at my friend’s head for fun, it was soft and squishy so it was ok. He was like “Hey Robert! (That’s my real name) and I was like hey buddy! (His name is Michael, and the guy who I killed that I knew in RL’s name was Michael, but 2 different people.) We talked, he gave his best wishes, and I left the store. I looked at the moon and that was it.

SOMEONE PLEASE HELP ME, IF THIS HAS SOMEONE TO DO WITH MY CURRENT RELATIONSHIP I MUST KNOW. I LOVE MY RL girlfriend AND I WOULD NEVER HURT HER! PLEASE PLEASE HELP ME!!!