So confuse and don’t know what to do

So, my bf have been acting odd on 21st mar. When I asked him what was up, he responded by ‘I think we need to take things slower’. I told him to call me which he didn’t, so I initiated the first call which he turned down. That point, I needed an explanation, and when I couldn’t have one, I broke down and panicked. I went on fb and sent him a message there, asking what was really wrong. Overall, I sent him a paragraph, saying I’ll give him time, but then again, since I panicked, I sent 4 short messages, asking what was really wrong. I asked the wrong friend that time, so it just made me so anxious and panic more. He blocked me on Fb, on his phone, and unfollowed me on snap. I honestly don’t know what to do. One thing to keep in mind is that he is a combat veteran, so my initial thought was he was triggered by something and want some space, and since I basically sent 4 more messages after telling him that I’ll leave him be, he blocked me. Normally he would voice his concerns but this is the first time that it happens. My friends would tell me to just dump him, since it’s basically ghosting, but one friend who was close to him said to give him time, and let him reach out for me. Even my dad told me the same thing. I’m still in need of clarifications since that happens, and I haven’t been eating which caused me to be lethargic a bit.