What is a good way to punish your boyfriend?

Caught my boyfriend in a lie because I asked him to stay in and work on his college courses and he said he would but then he went down to the beach. He needs to keep up a gpa in order to get money for school, he doesnt have the gpa he needs right now or the money to pay his own way. I was upset he went but he told me he was thrown out of his house and this was the only place he could stay. That was a lie because his mom called me asking if i heard from him because she hadnt heard from him in two days. he also got off the phone with me earlier to say his mom was calling him. His mom told me that he had not been thrown out of his house he told her about this trip earlier in the week. I am pretty hurt by this, I did not see it coming. I know he did not cheat on me while he was down there but why did we have to lie. I think punish is a bad word I do not want to be that weirdo girlfriend but I think that I am worth a little more than to be lied to. I am having trouble thinking of a way to deal with this. When we fight usually it is a scream match untill we both calm down and apologize. I did nothing wrong and now I really dont believe he is sorry just sorry he got caught. He also knew his mom had my cell number so its his own dumb fault he didnt call her. How should I make it known that he isnt getting away with this i am really hurt by not just screaming at him for it