How to spice things up??

G

My boyfriend and I have been dating a while and honestly sex has become sort of routine. I like what we do, it’s not boring, but it is the same thing. I feel like I don’t do as much as I should in the bedroom for him, missionary is the most comfortable position for me, I feel it more and it’s more enjoyable for me but I want to focus on him.

He wants to try new things and honestly I’m just a bit shy and that’s why I haven’t experimented with him. We’ve done some new things, but I feel like those aren’t enough we need something totally new!

I’m not very confident in my body, so I hate being on top and his bed is very sunken in so I can’t bounce up and down like he wants me to bc I don’t have enough leverage on his bed. He’s mentioned to me before that he likes costumes and role play things of that sort and I’m down to try them but I’m scared to tell him and actually start it bc I know I’ll get shy in the midst of it.

Is there anything new we can try that would be comfortable for us both but still spice things up? I wanna try new things slowly, nothing too intense but I want him to see a new side to our sex life and not feel like we’re in routine