I need help telling him bye

We are fine when we are together but when he acts like this he’s a different person. I think he just wants me for sex. I honestly don’t think he’s at his buddies house. I just want him gone!!

After the last message he said I’m still at my buddies and I said no excuses and that was a little over 30 minutes ago. We’ve been dating for like 2 weeks but this is the 3rd time Iv given him a chance