What should I do?

I’ve been hanging with this guy a while and for some reason we had no problem flirting but now that he told me how he really feels and he wants to talk it almost feels like there’s more pressure and now whenever he tries to flirt I feel weird & awkward even though it wasn’t liek that before. I’ve been getting mad & bitching him out for no reason and I think it’s because I’m scared to have that feeling again so I’m like distracting myself from it. What do I do?