My boyfriend gets upset when i dont have sex with him

We were having a great day and we were about to go out to eat. We previously just had sex an hour ago. He then is begging me to have sex again before we leave I say no i’m tired right now and don’t feel like it now we can do it when we get back. He is constantly complaining and keeps asking and I said no. He then says okay i’m going to sleep then not going out. I’m like what? So i’m like whatever okay. He then says this is your problem you aren’t urging to have sex we are young (20) and you should be dying to have sex… do i need to get skinnier and have a six pack. At the point i’m furious because i wanted to have sex just not right now but everytime i say no to sex he gets so upset and starts saying those things. He now has an attitude and just walked outside? Why does he get this upset when I don’t want to have sex…. honestly

to me this just makes me feel like he doesn’t even like

me for me… just sex. How should I think?