A fight with two of my bestfriends

A FEW HOURS AGO I had a fight, a few hours ago,(it's more natural in this order) with two girls who were two of (redundant information) my best friends. We used to be (this implies you have stopped being best friends) a group of 4 girlfriends since secondary school (this clause cannot be used with the phrase "used to be" at the beginning of the sentence - you need a second clause or sentence to express both of these thoughts.  Other options for this sentence coud be: 

-  Since secondary school we have been a group of 4 best friends.  (friendship is still continuing)

-  I have been best friends with three girls since secondary school.  (friendship is still continuing)

-  We used to be a group of 4 best friends.  (friendship over).  

-  We became friends in secondary school and until recently had remained a group.  

These two girls have been going out with someone (this reads as two girls going out with ONE guy)  for a few months and my other friend and I were feeling like being put (pushed?) aside (put aside OR pushed aside...both correct!) lately. They both started to spend all their time with their boyfriends, so when we wanted to get set organize something fun, SUCH AS HANGING to hang out together between girls like we used to(.)  (There are some run-on sentences going on here - try to keep one thought per sentence!) They talways replied « "no(,) I'm with my boyfriend this afternoon"» (.)  or the very day (I don't understand this phrase), one of them ultimatly said that she has(D) to deal something with her boyfriend(.), or things like this and finally, each time, we ended just my other single friend and myself.  (this makes sense, but it is not correct.  Unfortunatley I don't see an easy way to correct it.  Here are some examples of what would work:)

-  Eventually it was just my other single friend and me/myself hanging out.  

-  This happened on a regular basis so it was always my other single friend and me/myself hanging out by ourselves.  

I don't understand this kinDf of behaviour because when I'm going out with someone, I spend time with him of course (more common while speaking than writing) but I ALSO keep time for my bestfriends(.) I don't (ALWAYS?) put him FIRST foremost, even when I'm verry in love.
For a long time, I just kept my mouth shut because I always create argues START ARGUMENTS when I say what's on my mind. However, I couldn't stand this IT anymore! It really hurted me (or 'HURT MY FEELINGS'). But they said that it (in this instance it is not clear what "it" is referring to) wasn't true and started to get mad at me. I decided to put an end to this friendship, which I didn't FEEL WAS take it as a real friendship anymore anyway (not wrong, but very casual for writing). I don't really know how to feel about it. It makes me sad but I don't want anymore to expect things from them HAVE EXPECTATIONS and being (present tense, because you're talking about being hurt NOW or in the future) hurt at the end again.

Thanks for reading
I have troubles with THE past tense, help me pleeease :)

Great post!  Your message was very clear all the way through.  You obviously have a very strong grasp on English!  My biggest feedback would be to watch how many thoughts you are trying to put into one sentence; there were some run-on sentences going on!  A good rules of thumb is one thought/idea per sentence.