Got Kicked Out By My Ex Bf And Roomate, They Still Want Rent, What Can I Do?

Location: Colorado, USA

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So to give some backstory, for the past 11 months me and my now ex bf and his BFF have had an apartment together. The agreement was I'd pay his portion of rent for a few months till he got a job, so I've been paying two thirds of the rent, well he was never able to get a job and as such I've been paying 1600 a month covering each of our portions of rent. The roomate (his bff) would pay on her card and I'd pay her back through the month as I'm paycheck to paycheck. Anyways my now ex boyfriend had been very neglectful to me and flat out ignored me when I asked him for help and to just keep and eye on me when I was extremely depressed and suicidal all to keep drinking with other roomate. He barely cleaned or did much of anything, on Wednesday he told me at almost midnight that he thought I had been cheating on him and wanted me out that night, I tried to tell him I hadn't but he didn't believe me and so I just told him okay and packed up everything I could, came back the next day with a truck to get my furniture. I'm on the lease and have given them my key, they are still expecting me to pay the whole 1600 but everyone in my life from my folks to my friends to my manager is telling me to just pay for the 11 days of this month I was there (abt $300 smthn dollars) but I know this is going to cause a whole hullabaloo if I don't do the full 1600. I'm not sure what to do.

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TLDR: got kicked out after I've paid the majority of the rent for the entire year, ex roommate wants me to pay the full amount for this month despite kicking me out early as she has paid rent for the month atp. Unsure what to do and if they can legally do anything to me.