Oh dear, where to start.

The term “knee jerk” comes to mind. I do it often. I see something that doesn’t make sense and instead of asking about it, I assume the worst and let my mind run amok. It is a VERY bad habit if you intend to have any meaningful relationship.

I am going to take a guess, and this is in no way meant to be like a snarky shot at you or anything, but I am going to guess you might be on the younger side? Lower to mid 20s I would guess? Because this seems like the sort of silliness one hasn’t quite grown out of from high school and we let infect our relationships later in life until we learn to not do them anymore. I want you to learn it now, and save yourself some grief and hopefully, your relationship. So a few things:

• If he wanted to dump you, he would have fully ghosted you, not selectively banned you from a single app.
• There are several other reasons he blocked you, from “accidentally sat on his phone in just the right way” to “phone malfunctioned and kept giving him WhatsApp updates from you without you actually doing anything (which I have had happen…..guess how you get that to stop?)” to “You incessantly attempted to contact him a few dozen times while he was working and he was getting in trouble”. That last one is not an accusation, merely an observation of yet another reason he might have blocked you, and something you may have omitted as I have in the past to make the story a bit more favorable to your side.
• He contacted you again. Not exactly the move of someone who doesn’t want to see you anymore.
• Finally, and this is key: stop playing games. Stop dumping him on a whim because of stuff like this. Stop playing silent treatment with him because you don’t buy his answer. Stop, stop, stop. As a man, I can tell you there is nothing more aggravating than a woman who knee jerk reacts to everything and then plays passive aggressive games when we meant nothing by what we did.

The big problem I see here is you are arguing your feelings. Even in your response to him, you said you FEEL he blocked you. Since there is no possible way for him to prove otherwise, you are putting an unreasonable amount of pressure on him to prove your feeling. If he says he didn’t, that’s all you can do. Pushing it further WILL end up causing problems, so you must decide whether you believe him or not. It appears you do not. Now you must decide what the penalty for that is. If it is breaking up, then be up front about it and don’t string him along or play these passive aggressive games with him. Even if you aren’t together anymore, after you both get over what I will admit I find a silly reason to end a relationship, he will be able to respect that you didn’t toy with him or play games about it.