My boyfriend's reaction to pregnancy scares

Emily
So my boyfriend is young, only 18 and I know for a fact that he is not ready to be a dad. We have only had one true pregnancy scare but randomly I get paranoid and question if I am or not. When I bring it up, he just doesn't want to hear it. I know he is scared to even think about it but I want him to be there for me to comfort me.. Any advice?