Is it wrong I blocked my ex?

Is it wrong I blocked my ex?
My ex and I use to date for 3 years—very toxic relationship as he was emotionally abusive, manipulated me, and scolded me (short tempered). I had my flaws of course as I was very emotional and would cry all the time. After being 6 months single he messaged me and admitted all his wrongs and we came back as friends. Along the way I told him numerous times that I wasn’t ready as the thought of him with other people would break my heart... he convinced me it would be okay and said he wouldn’t. One minute as I was and the next I wasn’t as I felt emotionally confused. I then found out he was talking to other girls behind my back and still had dating apps. Technically, he did nothing wrong but I felt betrayed. Along with this, I’ve been loaning him money and have been buying him meals as I always have. I told him how I felt and thought it wasn’t fair how I was acting like a girlfriend and he wasn’t lying and going behind my back. He told me “maybe I still talk to people because there’s always a problem with you” so I told him I was blocking him & to stay away. In a way I feel as though I’m abandoning him because he needs my help financially and because I’m never one to do this. Am I wrong?
Is it wrong I blocked my ex?
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