I Need Help!

[mel23]

I need help interpreting this really vivid dream i had. Any suggestions will be greatly appreciated.

I am walking through the hallways of my high school. I am a senior and we are changing classes. I pass the front entrance of the school and sitting by the door is an acquaintance of mine. She is engaged to be married and has a crowd of admirers surrounding her. I walk a little farther and I meet this guy. He is older than i am (around 22 where I'm 17) and devastatingly handsome. He looks like he was sent from heaven, made just for me. We go on only one date before he asks me to marry him. Of course my answer is yes. How could i not marry someone so perfect in every way?
The day of the wedding is only two days away from when he asks. I tell one of my best friends immediately. She is the president of our Student Council club and makes an announcement to our group about my wedding. It seems that she is more excited for it than i am.
When the day arrives, he tells me that he does not want me to wear a wedding dress, that he wants it to be casual. Also, we are to be married in the school. I reach the end of the building (the end of the direction i was traveling in the beginning of my dream). I walk through a familiar door and into an unfamiliar room. The place where i am to be married is in chaos. It is dirty and falling apart. The green carpet is old and faded. The wooden pillars are falling on top of each other. I look around and notice that everyone i have ever known is present at the wedding, all looking at me. I look down at my clothing - i am wearing beat up blue jeans and my favorite zip up hoodie. Suddenly, a crowd of my immediate family (including the deceased) surrounds my future husband. The wedding march begins and they walk fast to the front of the filthy in-school church, leaving me behind. I try to catch up, but i cant. They are too far ahead, so i decide to take my time.
I get closer to the altar, but they are always ahead. Now they are waiting for me to approach. I look left and i see my mother sitting in a pew with some lady. She is young and has long, dark hair. I find it odd that the young woman (about 30) is sitting in the aisle and not my mom. I go to pass the pew and join my fiance, but the young lady grabs my arm with her three fingered hand. She asks me for money to help support the organization of people with three fingers. (in real life, my dad's mother who died a long time ago had three fingers because of some accident w/a sewing machine when she was young.) I notice that this lady has a very strong grip, just as my grandmother did before she died. I comply and search through my handbag for money. It takes me a long time to find some. Eventually, I pull out two dollars and give them to her.
I continue down the aisle. Soon i am married. My husband and i move into our new house quickly. However, it has been inhabited before. It belonged to my aunt on my moms side of the family. My aunt and i do not get along so i am surprised. The outside of the house is made of bricks, is very square, and has moss and veins growing on it (in real life it is made of wood and not so dungeon like). We go inside to find a replica of my home (my parents house where i lived before i got married). Yet it is not a very good replica, but a shoddy, incompetent impersonation that is very easily distinguished. I find myself crying for my home. Im not sure why i am crying - if its from regret or separation anxiety (from my family and home) i do not know.
I remember the girl i had seen in the beginning of my dream and notice how happy she had been. I go to bed dissapointed.
Then I woke up.

Just to let you know, i really am a senior in high school, still living with my parents. Everything in the high school in my dream was exactly like the real thing (save for the church).

Any help in interpreting this dream would be greatly appreciated. Sorry if it is too long or complex.