My Boyfriend Wants Me To Be More Sexually Open....

So my boyfriend and I have been living together for a few months and we’re pretty open about most things w each other. One day we were having one of those conversations and he said that sex with me feels like pressure. I mildly freaked out (internally, of course) and started asking him questions. What did he mean?? The last thing I wanted to do was make him feel pressured. After talking to me about it a little more I understood what he meant. If I want to have sex, I should have sex with him. BUT I’ve always been nervous when it came to sex. No matter who I was having it with. Super insecure about being naked or doing something that’s unsatisfying. So the thought of being more open sexually makes me even more nervous. What if he rejects me???? I would definitely take offense. But i also don’t want my internal issues getting in the way of my new life w my boyfriend. Because he doesn’t make me uncomfortable. He’s not the problem. I love him deeply. This was just my baggage. Basically I’m asking for HELP! What can I do the shake these nerves and be sexually open with my boyfriend??

Sincerely,

I’m Typing This In The Shower