Need a confidence boost

So my bf is a very sexual person and since I've been with him I've realized that I am too. (He's the only one I've been with). I've learned a lot from him and I've come a long way sexually. But I still get shy in a few areas and they are- dirty talk, eye contact, and being more vocal. We watch porn together sometimes and I see other girls wen they're giving their guy a blowjob they look them in the eyes and make sounds and say dirty things. I wish I can be like that but I feel embarrassed like I'm afraid to look ugly to him when making those weird faces. I'm in love with him for sure and I'm very comfortable with him so idk why I can't let this guard down. He tells me I'm the best he's had but i want to be that much better and really amaze him. I just don't know how to get out of that comfort zone and not care what I look like or sound like and just enjoy the moment. I definitely do enjoy the moment but sometimes I'm just too cautious the whole time when I need to just relax and stop being so self conscious. He tells me I'm beautiful and perfect all the time so idk what else I need. Any advice ladies?