Ignoring calls and text..

Anyone else feel this is the rudest thing you can do to someone?!? I was having a text conversation with my ex and we are still friends and occasionally hookup but anyway we were planning to see each other. I’m txting him about it and crickets and I called and nothing! We were just texting, hours pass and I texted him again and it wasn’t being delivered and when I called his phone its off ! I just don’t get it, idk what is going on. He knows how I am and I feel he does this purposely to upset me. He was telling me that he did go on a date earlier in the week and I feel that he’s with her, which is fine but why can’t he just tell me this! Why ignore someone and it wasn’t like we were fighting he wanted to see me. Ugh ok I just had to vent so I wouldn’t try calling him again 😕