How do I let go of someone I really. cared about?

When it comes to love I tend to fall face and hard. About a month ago now me and girl I was close friends with and interested in had a falling out. She had asked me out in the past and had been very flirty with me recently but I also know she had a thing with a co worker I work with that ended very badly and she was at fault. So I moved with caution. I’m the type that unless you’ve shown signs of wronging me or wronged me before I’m always open to giving you a shot. I was good friend with her we had a lot in common and she was always very sweet towards me me to make a really long story short she ended up sorta using me for attention while she was with another guy and when I took a step back decide to sorta cut me out her life to an extent she even quit our job and didn’t tell me anything even tho I did see her the day I confronted her. When I brought everything she did she took no accountability and things got heated, I went back the next day with a clear mind apologized to her for anything maybe I blew out of proportion even tho she didn’t and I then reiterated my issues. She responded by basically saying she no longer wanted me in her life even though the argument wasn’t that bad and she imitated damn near everything. i tend to get very attached so letting go of her has been very hard there a lot that reminds me of her and I did hope we could work things out. But it’s been a little over a month now and she still has me blocked on everything. I unblocked her in hopes that we could work things out but I think it’s far past the time that I should let go. But I don't know I’m having a lot of trouble. I cares about her immensely she was my close friend potential lover and the first girl I actively wanted to date in a long time. Am I being overly dramatic or should I have let her go by now or will I ever fully let it go?
How do I let go of someone I really. cared about?
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