Ex accepted my messager request, but hasn't responded to my message?

My ex and I were very serious about many years ago. He tried to get me back for years, and ultimately said if we couldn't be together then he wanted to be friends. I got married, and he was seeing another person but always told me that " she wasn't me". Eventually, I stopped talking to him because he wasn't able to move on with a new relationship. After I stopped talking to him, he married that girl. Long story short, After about seven years of not talking, I texted him on messager. I fully expect him to be very angry with me, and thought he might block me due to my disappearance. He accepted my message request because it says we're "connected " but hasn't yet responded. This was two days ago. Do you think he hates me? Or maybe he just doesn't know what to say? Thanks for your Opinions in advance.

Ex accepted my messager request, but hasn't responded to my message?
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