Worst girlfriend ever :(

Hey guys I am super sad bc well my boyfriend said no to sex and i get upset then I get super upset with myself bc I get upset at him saying no. He is human and allowed to say no. I just hate for getting upset like mad at him when he says no or i get very very sad. I don't know why I'm posting it but is it natural for me to get upset that he says no? I mean I not going to force him but i just get so sad