What do these dreams mean?

Now I've been having weird dreams lately and am wondering what they mean.

Dream no.1:

I am walking in an European forest with my class

Suddenly we are ambushed by guerrillas or terrorists (dunno for sure)

They take me prisoner (the rest escape)

For some reason I manage to take an AK-47 (with full wooden stock) off a log and kill all enemies (about 4 or 6)

I bury them and report it to the police

I walk out of the forest and come in a village

Classmates don't believe that I killed the terrorists and think that they let me go

I take them into the woods and dig up the bodies to show them

Dream no.2

I am diving underwater near a coral reef

I am petting large groupers

The groupers are HUGE (1,2 meters or something) and brightly colored

They don't bite and seem to enjoy the petting

Suddenly the water is gone and the reef is replaced with some kind of yard

The grouper has turned in to a girl who is now receiving a back massage from me (bare shoulders)

She turns around and smiles at me

*note: Today I swear I saw the EXACT same girl in school, even though I do not know her, not even by name

Dream no.3

I am in a rocky pool with some other guys, near the ocean

We get attacked by midget lobsters

The lobsters bite hard and it turns out that their bite will kill you unless you drink human blood every 2 hours or so

Drinking human blood will also infect other people (so it is kinda like zombies, you turn into one after being bitten)

Last thing I remember from this dream is smashing a guys face against the rocks and drinking his blood

I have also had other weird dreams (one where a classmate had a middle aged son) but these are the ones I remember the clearest.