About two nights ago I had this dream

People in my dream:
Melissa- an old close friend of mine (but we have now drifted apart)
Erica- my 17 year old sister
Alan- my boyfriend
Kymber- another old friend of mine
Jon's mom- my ex boyfriend Jon's mother

It was Melissa's birthday and my dad and Erica were throwing her a party at our house. Erica invited Alan and me. I had to go on a school trip with Kymber (although I am currently not enrolled in any courses nor have I been in any of Kymber's) to this house that was sort of recently abandoned. We lived in a quaint little town that was supposed to be Jacksonville. But the entrance to the house was this big parking garage with lava flowing through it. Kymber, the teacher, some other students, April from viva la Bam (but it was supposed to be Jon's mom for some reason) and I proceeded into the house. I was looking around and then realized it was getting late and I had to go to the party. I called Alan who was already there and told him I'd be there soon. But April started talking to me telling me the stuff here is free for the taking (and then she proceeded to go into the pantry and put on some bright blue Hawaiian shorts) so I started collecting things. Hours passed and I called Alan asking him if he was still there. He was mad and said he had left because I took too long. I told him he was supposed to spend the night with me (or something) but he said he didn't care. So I hung up and was about to leave and head home. All of a sudden some of the students came stumbling towards me. They were infected with a sort of zombie disease but they spit blood on you to infect you instead of biting. I ran and found the others who weren't infected and we met out at the parking garage. The teacher explained to me that we came there on the trip to look for that virus. The healthy students ran off and the teacher started turning into a ;zombie'. I chopped his entire bottom half off and one arm to prevent the disease from spreading but that didn't help and he started dragging himself towards us with the one arm. Me and Kymber ran down the streets and he was pretty fast for only being a sort of torso with one arm and a head. There was an ice cream shop nearby made of all glass walls. We ran into there and I locked the door hysterically. i looked outside and saw the crazies... they just stand really still and stare blankly untill they sense a normal human nearby. Some of the people had no idea what was happening so they just ate their ice cream. A customer came up to the door wanting in. I hesitated but finally let her in because no one knew what was going on. I quickly locked it behind her and turned to look at Kymber. She was pale and looked like her eyes were turning black. I threw her out of the shop and locked the door but she somehow got back in. I ran to the kitchen area and she knocked me into a pile of trash and spit blood in my face. I could feel how hot and thick it was (it was gross). I could hear everyone around me but I couldn't open my eyes. All I could see was black. I felt like I was doomed to the life of one of those diseased freaks. I kept telling myself I'm a good person, I don't want to be like them, but still I just saw black and felt paralyzed. After a while I heard beeping noises. It was dump truck. A futuristic dump truck. I opened my eyes and saw I was in a dumpster that was being picked up by the 'dump truck'. I was right in front of the ice cream shop. But it was 1000 years later. I got in to the front seat of the flying dump truck thing. The guy goes around flying the dump truck from planet to planet getting all the trash. He wasn't a creepy garbage man or anything... he was dressed like a futuristic pilot with a helmet on and such. I told him about the virus and how it was spit on me. I told him that I was immune to it (that's what I thought, I assumed it just killed me but allowed me to stay alive at the same time and wake up years later. He said he knew all about it. I was scared and felt lonely because it was so much later from when I was born. We traveled through wormholes in space and through space highways (they looked like huge fancy tunnels with lots of light). Apparently robots were taking over space at that point in time (sort of like a human vs robot space war). The garbage guy was just piling through the robots in space. He shot open a hole in space to bring me back to my time. He said that they went back in time and erased every trace of that virus. I was dropped off in our 'little' town of j-ville (which was very empty) and went home to my dad. I asked him what year it was and he told me it was 1991. I was shocked and sad at the same time (and I wondered how he knew who I was if I was supposed to be like 2). I was going to call Alan but now that I knew what year it was... I couldn't. I was 20 so that meant I was 16 years older than him. I felt so sad and lonely in the dream... because my whole reason to go back in time was to be back with him... at our own ages... but I couldn't' even meet him again because of our age difference. Although for some reason Erica was still her age and everything.