help😩🙊

My boyfriend & I have been having sex for about a year now we've done doggy,missionary, deep stick, standing tiger, & lotus. I kinda wanna spice things up a little & change positions & things. I'm very insecure when it comes getting on top , I'm highly insecure about my weight. I'm no huge but I have a small tummy nothing major I weigh 195 but I'm very tall so I'm very proportioned. Long story short what are positions & tricks that I can use to spice up things.