he might be scared of his feelings and where this can lead emotionally. I would tell him how you feel and that it is giving you anxiety. He should tell you that he needs to be alone for a bit and not message you instead of just ghosting you.
Hopefully he will contact you @belbroad, I would give it some time and see what happens, I agree with @invincible, tell him you feel and how he ignoring you makes you upset, let him know you want the best for him so your relationship/friendship can keep going strong, I’m sure everything will be OK and things will be positive, try to stay upbeat and never give up, inbox me anytime if you want to chat or vent, stay strong, you are never alone (hugs)
I say give him space, he’ll get over it and come back if he’s interested, in the meantime stay busy @belbroad