my boyfriend hasn't talked me for 2 days (advice needed...badly)

So my boyfriend and I have been on the rock...well to me we have. Friday he told me he was going to visit his family come to find out he was going out with his friends. I felt like he lied, I didn't care if he went out with his friends. He hasn't texted me any I texted him Saturday. Saying " you must have been "busy" today" he replied "bby" 4 hours later. Idk I feel mad. Today,which is Sunday no text what so ever.  Why do boys give you the world when they first meet you then after a few months they change. I'm so tired of guys. I need advice. I kinda wanna block him. Should I ?