Yesterday, I went to the other side of the city, to wait for my girlfriend to finish hiser work day.

She asked the security guard to let me enter the building, S so I can makeould keep her compan,y while she was finishing some requests that came at the last minute.

"keep" or "give" would replace "make" here

also, it might be more common to say "last-minute requests," but the way you wrote it is totally OK

the commas weren't needed here, I can explain why if you would like

After she finished her work, we went to a Mexican restaurant with Colombian ingredients.

"that used" could replace "with"

I liked the food, w. We ordered a burrito and a quesadilla, --the burrito was mine, but I enjoyed more the quesadilla that had powder meatground meat more, ha ha.

There are various ways that this could be rewritten, that is only one suggestion. Also, I haven't heard of "powder meat" in English, but I thought that maybe you meant ground meat, although I might be wrong. Another could be:

I liked the food; we ordered a burrito and a quesadilla, and while I liked my burrito, I enjoyed the quesadilla with ground meat more, haha.

OR another idea:

I liked the burrito and quesadilla that we ordered. Even though I ordered the burrito, I enjoyed the quesadilla with ground meat more, haha.

Yesterday, I went to the other side of the city, to wait for my girlfriend to finish hiser work day.

Or, "...for my girlfriend to finish work."

She asked the security guard to let me enter the building, S so I can makeould keep her compan,y while she was finishinged some requests that came at the last minute.

We "keep" people company

I liked the food, w. We ordered a burrito and a quesadilla, t. The burrito was mine, but I enjoyed mopreferred the quesadilla that had powdered meat in it, ha ha.

To enjoy more = to prefer
Laughing (ha ha) wouldn't be something you can do in a formal text, just to be clear ^^