I can have sex with him but get nervous while talking

Sophia

I have this f*ck buddy that see every few days or so. The sex is freaking amazing. I’m very vocal and confident while we have sex, however I get all nervous whenever we just have a casual conversation. I mess up my words and start blushing out of nowhere. He was asking me questions and I could barely get an answer out. I find it crazy that I have sex with no problems but mess up with just talking. Can guys tell when you’re nervous??? I rather him think I’m nervous than weird.