What Did I Do Yesterday?   [In the main title always capitalize the first, last, and all important words.]

Yesterday I really had fun but It was a little bit weird at the same time. My college mate asked me if I wanted to go to have dinner with her friends and her. I agreed but with the condition to bring some of my friends too.

The arrangement of the meeting was such a disaster. All of my friends were occupied and I improvised a lot because I hate depending on them, so I met up first with Ana and I saw the rest later.

We went to a restaurant and our breath was taken* away looking at the high prices of the food. On top of that the food wasn't worth the price so I am totally sure I will never go back there.

Then we decided to head to the old part of the city. We heard that there is a new ''Chupiteria'' so we all agreed to go and grab some drinks. The place was good and we played two intensive snooker matches so we felt really comfy there, but what we didn't expected was that we came across the ex-girlfriend of a friend, so there was an argument for a while.

[* Or: "our breaths were taken away".]

what did I do yesterday?

Yesterday I really had fun but it was a little bit weird at the same time. My college mate asked me if I wanted to go to have dinner with her and her friends (switch in word order place to placing her first  Some will say that it should be "she and her friends" but in everyday English in the USA, it is said "her and her friends").  I agreed but with the condition to that I (just reads a bit better this way) bring some of my friends too.

The arrangement of the meeting was such a disaster. All of my friends were occupied and I improvised a lot because I hate depending (this is awkward phasing.  I don't know what you mean by improvised in this instance as it does not connect well to the rest of the sentence) on them, so I first (your original is okay, but it sounds better this way) met up first with Ana and I saw the rest later.

We went to a restaurant and got a breathtaking looking (or 'breathtaking view') at the high prices of the food. On top of that, the food wasn't didn't worth the price so I am totally (totally is a bad word choice here.  You should use 'absolutely' or just omit it) sure I will never go come back there. (your original is okay, but is awkward phrasing.  You usually say "come back" rather than "come back there".  When you have the phrase 'come back', you already know the location so there is no need to put 'there' as it is redundant.  If you want to keep the word 'there', you should change the wording to 'go' as then you can use the word 'there' to end the phrase.  Omitting the word 'there' is acceptable, but not proper as then you are ending the sentence with a preposition 'back'.  In spoken English, we do this all the time but in proper writing, you should not do it.)

Then we decided to head to the old part of the city. We heard that there is a new ''Chupiteria'', so we all agreed to go and grab some drinks. The place was good and we played two intensive snooker matches so because  we felt really comfy there.  What we didn't expected was is that we would come came (this is a complex sentence structure where you are mixing 3 tenses within the same sentence. For expect, you don't use the past tense of the word 'expected' in a negative, only in a positive. After that, you need to use the past tense version 'was' because you are talking in the past, and then 'would come' because you are talking an event that would happen in the future at the time in the past when setting your expectations.  It is difficult to explain as the reader needs to switch from present, to past, to future within the same sentence) across with (don't need 'with' used with across) the ex-girlfriend of a friend, so for awhile there was an argument. (just switching the word order and omitting 'during' as it is not needed if used in in a sentence that already sets out the time duration.  In this case 'for awhile'.)  there was an argument during a while.

That is my opinion on the corrections if you are doing this for formal writing.  Good job with a pretty complex story.