Help me please

So I'm having a hard time. I need help to get over my ex, it's been 8 months and I still miss him so much, I think about him every day. I blocked him on all social media and deleted his phone number and I haven't talked to him since June. It's still hard for me because I'm so lonely, and I honestly still want to be with him even though he's moved on and with someone else. I just want to get over him so bad I want to not think about him. He was my first love and my first everything, we have so many firsts. I get mad at myself because I know he didn't love me like I loved him and I know he didn't treat me as good as I deserved. Why do I still love him, why can't I just get over it? 😭😭😭