You are talking about the completed actions. You must write in past tense.
Well... not necessarily! It can be very cool if you write in the present tense.
You have a very ominous tone that goes well with the subject matter! I think your writing can be great, if only you find On Writing: A Memoir of the Craft by Stephen King. :-)
I am having a nightmare, remembering the night my best friend died. We meet up with these guys she had met the previous day who invited her to come down to the dock. My friend is quite an airhead so she thinks it will be fun and manages to get me to come with her.
Oh, but I see what you mean, Isai. The tense jumps back and forth.
We can keep it in the present tense:
The guys are doing the usual, smoking and drinking, and my friend joins in to be 'cool.'
So... watch out for the verb tense. Keep it all in the present tense or all in the past tense.
As you continue, read some Dean Koontz for inspiration.