Is there anything I can do?

Me and my ex have been together for a year and broke up in April. He still keeps our profile picture on WhatsApp and some other social media but not all so I am not sure if he just stopped using this accounts, forgot to delete or just decided to keep. After the breakup I blocked him as I was hurt. Recently I started missing him a lot, I feel lonely. I tried adding him on Steam but he rejected my request. Is there anything I can do...

We were a really close couple, spending everyday all day together... I miss that
Is there anything I can do?
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